Return a reference to the object, changed from pointer.

Since we use addAutoReleasedObject we would rather unclean call the
class destructor.

src/plugins/qt4projectmanager/qt4projectmanagerplugin.cpp

@@ -146,7 +146,7 @@ bool Qt4ProjectManagerPlugin::initialize(const QStringList &arguments, QString *
     addAutoReleasedObject(new LinguistExternalEditor);
 
     addAutoReleasedObject(new S60Manager);
-    addAutoReleasedObject(MaemoManager::instance());
+    addAutoReleasedObject(new MaemoManager);
 
     new ProFileCacheManager(this);