Make close event trigger consistently

src/PowderToySDL.cpp

@@ -304,7 +304,6 @@ void EventProcess(SDL_Event event)
 	switch (event.type)
 	{
 	case SDL_QUIT:
-		engine->onClose();
 		if (engine->GetFastQuit() || engine->CloseWindow())
 			engine->Exit();
 		break;

src/gui/interface/Engine.cpp

@@ -72,6 +72,7 @@ void Engine::UnBreak()
 
 void Engine::Exit()
 {
+	onClose();
 	running_ = false;
 }