Properly unload screens before exiting, correcting a FIXME

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@5957 178a84e3-b1eb-0310-8ba1-8eac791a3b58

src/graphics/irr_driver.cpp

@@ -325,8 +325,8 @@ void IrrDriver::doApplyResSettings()
     kart_properties_manager -> unloadAllKarts();
     powerup_manager         -> unloadPowerups();
     GUIEngine::clear();
-    GUIEngine::cleanUp(); //FIXME: cleanUp is not called when exiting normally, only when changing resolution!
-
+    GUIEngine::cleanUp();
+    
     //std::cout << "^^^^^^^^ Closing m_device ^^^^^^^^\n";
     m_device->closeDevice();
     //std::cout << "^^^^^^^^ Dropping m_device ^^^^^^^^\n";

src/states_screens/state_manager.cpp

@@ -215,6 +215,7 @@ void StateManager::onTopMostScreenChanged()
 
 void StateManager::onStackEmptied()
 {
+    GUIEngine::cleanUp();
     main_loop->abort();
 }   // onStackEmptied