Fix crash: check ret type before accessing table fields

[Nizarberyan]

i tried to use a joker and the game crashed so i fixed it, here is the error i got (and also fixed a spelling mistake)

Oops! The game crashed:
...Roaming\Balatro\Mods/balatro-plus/src/bplus\override.lua:126: attempt to index local 'ret' (a boolean value)

Additional Context:
Balatro Version: 1.0.1o-FULL
Modded Version: 1.0.0~BETA-1016c-STEAMODDED
LÖVE Version: 11.5.0
Lovely Version: 0.8.0
Platform: Windows
Steamodded Mods:
    1: Balatro+ by SomeCoder99 [ID: balatro_plus, Version: 1.0.2-a, Uses Lovely]
Lovely Mods:

Stack Traceback
===============
(3) Lua method 'calculate_joker' at file 'C:\users\steamuser\AppData\Roaming\Balatro\Mods/balatro-plus/src/bplus\override.lua:126'
Local variables:
 self = table: 0x05efd9b0  {click_offset:table: 0x041b3ba0, static_rotation:false, ambient_tilt:0.2, parent:table: 0x041393b0, T:table: 0x041b3b78, last_aligned:-1, extra_cost:0 (more...)}
 ctx = table: 0x13d93bf0  {destroying_card:table: 0x06322218, main_eval:true, poker_hands:table: 0x098d5448, scoring_name:High Card, scoring_hand:table: 0x06032880, full_hand:table: 0x0d3110f0 (more...)}
 ret = boolean: true
 (*temporary) = nil
 (*temporary) = nil
 (*temporary) = string: "attempt to index local 'ret' (a boolean value)"
(4) Lua upvalue 'eval_card_ref' at file 'functions/common_events.lua:718'
Local variables:
 card = table: 0x05efd9b0  {click_offset:table: 0x041b3ba0, static_rotation:false, ambient_tilt:0.2, parent:table: 0x041393b0, T:table: 0x041b3b78, last_aligned:-1, extra_cost:0 (more...)}
 context = table: 0x13d93bf0  {destroying_card:table: 0x06322218, main_eval:true, poker_hands:table: 0x098d5448, scoring_name:High Card, scoring_hand:table: 0x06032880, full_hand:table: 0x0d3110f0 (more...)}
 ret = table: 0x186fa658  {}
 post_trig = table: 0x046fe760  {}
 areas = table: 0x04560538  {1:table: 0x041393b0, 2:table: 0x062e6f58, 3:table: 0x135780b0}
 area_set = table: 0x046fe788  {table: 0x062e6f58:true, table: 0x041393b0:true, table: 0x135780b0:true}
(5) Lua global 'eval_card' at Steamodded file 'src/overrides.lua:2385' 
Local variables:
 card = table: 0x05efd9b0  {click_offset:table: 0x041b3ba0, static_rotation:false, ambient_tilt:0.2, parent:table: 0x041393b0, T:table: 0x041b3b78, last_aligned:-1, extra_cost:0 (more...)}
 context = table: 0x13d93bf0  {destroying_card:table: 0x06322218, main_eval:true, poker_hands:table: 0x098d5448, scoring_name:High Card, scoring_hand:table: 0x06032880, full_hand:table: 0x0d3110f0 (more...)}
(6) Lua field 'calculate_card_areas' at Steamodded file 'src/utils.lua:1659' 
Local variables:
 _type = string: "jokers"
 context = table: 0x13d93bf0  {destroying_card:table: 0x06322218, main_eval:true, poker_hands:table: 0x098d5448, scoring_name:High Card, scoring_hand:table: 0x06032880, full_hand:table: 0x0d3110f0 (more...)}
 return_table = nil
 args = table: 0x03d6a6d8  {has_area:true, joker_area:true}
 flags = table: 0x03d6a700  {}
 (for generator) = C function: builtin#6
 (for state) = table: 0x04bfcd38  {1:table: 0x041393b0, 2:table: 0x062e6f58, 3:table: 0x135780b0}
 (for control) = number: 1
 _ = number: 1
 area = table: 0x041393b0  {click_offset:table: 0x04aba248, static_rotation:false, shuffle_amt:0, T:table: 0x0456afb8, offset:table: 0x0409bf58, role:table: 0x0622fa00, last_aligned:-1 (more...)}
 (for generator) = C function: builtin#6
 (for state) = table: 0x135a2aa8  {1:table: 0x05efd9b0}
 (for control) = number: 1
 _ = number: 1
 _card = table: 0x05efd9b0  {click_offset:table: 0x041b3ba0, static_rotation:false, ambient_tilt:0.2, parent:table: 0x041393b0, T:table: 0x041b3b78, last_aligned:-1, extra_cost:0 (more...)}
(7) Lua field 'calculate_context' at Steamodded file 'src/utils.lua:1902' 
Local variables:
 context = table: 0x13d93bf0  {destroying_card:table: 0x06322218, main_eval:true, poker_hands:table: 0x098d5448, scoring_name:High Card, scoring_hand:table: 0x06032880, full_hand:table: 0x0d3110f0 (more...)}
 return_table = nil
 no_resolve = nil
 has_area = boolean: true
 flags = table: 0x187c6650  {}
 (*temporary) = number: 1
(8) Lua field 'calculate_destroying_cards' at Steamodded file 'src/utils.lua:2069' 
Local variables:
 context = table: 0x13d93bf0  {destroying_card:table: 0x06322218, main_eval:true, poker_hands:table: 0x098d5448, scoring_name:High Card, scoring_hand:table: 0x06032880, full_hand:table: 0x0d3110f0 (more...)}
 cards_destroyed = table: 0x06320390  {}
 scoring_hand = table: 0x06032880  {1:table: 0x06322218}
 (for generator) = C function: builtin#6
 (for state) = table: 0x0d3110f0  {1:table: 0x06322218}
 (for control) = number: 1
 i = number: 1
 card = table: 0x06322218  {click_offset:table: 0x044f63f0, base_cost:1, children:table: 0x06265ff0, ambient_tilt:0.2, parent:table: 0x13d25560, under_overlay:false, T:table: 0x06322408 (more...)}
 destroyed = nil
 in_scoring = boolean: true
(9) Lua upvalue 'g_funcs_evaluate_play' at file 'functions/state_events.lua:799'
Local variables:
 e = nil
 text = string: "High Card"
 disp_text = string: "High Card"
 poker_hands = table: 0x098d5448  {Flush House:table: 0x1074f4e8, Full House:table: 0x06025068, top:table: 0x0630c550, Flush:table: 0x06033a20, Pair:table: 0x04c27038, Four of a Kind:table: 0x04154c60 (more...)}
 scoring_hand = table: 0x06032880  {1:table: 0x06322218}
 non_loc_disp_text = string: "High Card"
 final_scoring_hand = table: 0x06032880  {1:table: 0x06322218}
 hand_text_set = boolean: false
 modded = nil
 nu_chip = nil
 nu_mult = nil
 cards_destroyed = table: 0x06320390  {}
 (for generator) = C function: builtin#6
 (for state) = table: 0x13d93bc8  {1:table: 0x13d25560, 2:table: 0x099a7fb0}
 (for control) = number: 1
 _ = number: 1
 v = table: 0x13d25560  {click_offset:table: 0x0995ac30, static_rotation:false, shuffle_amt:0, T:table: 0x13d78e40, offset:table: 0x0629a4b8, role:table: 0x04b539d8, last_aligned:-1 (more...)}
(10) Lua field 'evaluate_play' at file 'C:\users\steamuser\AppData\Roaming\Balatro\Mods/balatro-plus/src/bplus\override.lua:48'
Local variables:
 e = nil
(11) Lua field 'func' at file 'functions/state_events.lua:564'
(12) Lua method 'handle' at file 'engine/event.lua:99'
Local variables:
 self = table: 0x13d6e220  {start_timer:true, timer:TOTAL, blockable:true, trigger:immediate, func:function: 0x04540ae8, delay:0, complete:false, time:3428.7890116364, blocking:true (more...)}
 _results = table: 0x0d317aa8  {blocking:true, pause_skip:false, time_done:false, completed:false}
(13) Lua method 'update' at file 'engine/event.lua:182'
Local variables:
 self = table: 0x03d6dfa8  {queue_last_processed:1715.9833333321, queues:table: 0x03d6ee20, queue_dt:0.016666666666667, queue_timer:1737.9171457677}
 dt = number: 0.0166288
 forced = nil
 (for generator) = C function: next
 (for state) = table: 0x03d6ee20  {unlock:table: 0x03d6fc58, other:table: 0x03d6d788, tutorial:table: 0x03d6d180, base:table: 0x03d70b10, achievement:table: 0x03d6d1a8}
 (for control) = number: nan
 k = string: "base"
 v = table: 0x03d70b10  {1:table: 0x107ece10, 2:table: 0x03dd5e08, 3:table: 0x13d6e220, 4:table: 0x04c5fef0, 5:table: 0x10737e68, 6:table: 0x03e0bda0, 7:table: 0x06059068 (more...)}
 blocked = boolean: false
 i = number: 3
 results = table: 0x0d317aa8  {blocking:true, pause_skip:false, time_done:false, completed:false}
(14) Lua upvalue 'gameUpdateRef' at file 'game.lua:2600'
Local variables:
 self = table: 0x03a92b30  {F_GUIDE:false, F_CRASH_REPORTS:false, F_QUIT_BUTTON:true, HUD_tags:table: 0x05f1c878, F_ENGLISH_ONLY:false, viewed_stake:1, HUD:table: 0x04524168 (more...)}
 dt = number: 0.0166288
 http_resp = nil
(15) Lua method 'update' at Steamodded file 'src/ui.lua:124' 
Local variables:
 self = table: 0x03a92b30  {F_GUIDE:false, F_CRASH_REPORTS:false, F_QUIT_BUTTON:true, HUD_tags:table: 0x05f1c878, F_ENGLISH_ONLY:false, viewed_stake:1, HUD:table: 0x04524168 (more...)}
 dt = number: 0.0166288
(16) Lua field 'update' at file 'main.lua:1007'
Local variables:
 dt = number: 0.0166288
(17) Lua function '?' at file 'main.lua:946' (best guess)
(18) global C function 'xpcall'
(19) LÖVE function at file 'boot.lua:377' (best guess)
Local variables:
 func = Lua function '?' (defined at line 917 of chunk main.lua)
 inerror = boolean: true
 deferErrhand = Lua function '(LÖVE Function)' (defined at line 348 of chunk [love "boot.lua"])
 earlyinit = Lua function '(LÖVE Function)' (defined at line 355 of chunk [love "boot.lua"])