Reset the function return code when opening/closing the menu

This helps to avoid any bugs with it not being reset.

Author: Zephiles

ttyd-tools/rel/source/menufunctions.cpp

@@ -69,6 +69,7 @@ void resetMenuToRoot()
 {
 	CurrentMenu 			= ROOT;
 	MenuSelectedOption 		= 0;
+	FunctionReturnCode 		= 0;
 	HideMenu 				= false;
 	resetMenu();
 }