Refactor/round end (#479)

* Initial round_end extraction

* move hands to game vars

* Checkpoint

* Finish removing all variables for state fns

* Move over round_end substate functions

* Move over round_end with compile

* working in general

* Fix round start state issue

* clang-format

* Fix clang format issue

* PR fixes and standardize types in game vars struct

* Clang-format

source/game/common_ui.c

@@ -4,6 +4,7 @@
 #include "game.h"
 #include "game/main_menu.h"
 #include "game/options_menu.h"
+#include "game/round_end.h"
 
 typedef void (*BackgroundRenderCallback)(void);
 
@@ -14,7 +15,7 @@ static const BackgroundRenderCallback bgCallbacks[] = {
     [BG_NONE] = NULL,
     [BG_CARD_SELECTING] = NULL,
     [BG_CARD_PLAYING] = NULL,
-    [BG_ROUND_END] = NULL,
+    [BG_ROUND_END] = game_round_end_change_background,
     [BG_SHOP] = NULL,
     [BG_BLIND_SELECT] = game_blind_select_change_background,
     [BG_OPTIONS_MENU] = game_options_menu_change_background,