qtscript: Trigger eventCheatMode before eventGameInit

If cheat mode is enabled in some campaign mission,
it is carried over to the next mission.

But scripts of the next mission have no memory
of the previous level, so they need to be
explicitly informed that cheat mode
is still enabled.

src/init.cpp

@@ -1310,6 +1310,8 @@ bool stageThreeInitialise(void)
 
 	if (getLevelLoadType() != GTYPE_SAVE_MIDMISSION)
 	{
+		if (getDebugMappingStatus())
+			triggerEventCheatMode(true);
 		eventFireCallbackTrigger((TRIGGER_TYPE)CALL_GAMEINIT);
 		triggerEvent(TRIGGER_GAME_INIT);
 	}