Fix event command "Return to Title Screen" (#124)

Fix loading a game after event command "Return to Title Screen" starting a loop.

Data/Scripts/003_Game processing/002_Scene_Map.rb

@@ -164,6 +164,8 @@ class Scene_Map
     end
     updateSpritesets
     if $game_temp.to_title
+      $game_temp.to_title = false
+      SaveData.mark_values_as_unloaded
       $scene = pbCallTitle
       return
     end