Fix crash at exit with Qt 4.8

BUG: 285951
FIXED-IN: 2.5

ChangeLog

@@ -8,6 +8,7 @@ Version 2.5
       Playlist's layout items.
 
   BUGFIXES:
+    * Fix crash at exit with Qt 4.8
     * Fix moving applets rightward in the context toolbar.
     * Fix breadcrumbs not working properly for the file browser.
     * Disable cover fetching action for tracks not in the collection to avoid

src/core-impl/collections/support/CollectionManager.cpp

@@ -135,7 +135,12 @@ CollectionManager::~CollectionManager()
     d->unmanagedCollections.clear();
     d->trackProviders.clear();
     qDeleteAll( d->managedCollections );
-    qDeleteAll( d->factories );
+
+    // qDeleteAll seems to be partly broken in Qt 4.8, FIX: 285951
+    // qDeleteAll( d->factories );
+    while (!d->factories.isEmpty())
+        delete d->factories.takeFirst();
+
     delete d;
 }