Fixed a bug with quit_game_bed

The interpreter needs to +1 to the index before saving or else
quit_game_bed will have the game stuck in an infinite loop of quitting
the game when reloading, but we need to -1 immediately after because
otherwise the interpreter will skip a command after this is called.

scripts/SaveLoad.rb

@@ -92,5 +92,6 @@ end
 def quit_game_bed
   $game_system.map_interpreter.index += 1
   save
+  $game_system.map_interpreter.index -= 1
   $scene = nil
 end