If Query is null, return empty VariantMap

src/libtomahawk/PlaylistEntry.cpp

@@ -56,8 +56,16 @@ QVariant
 PlaylistEntry::queryVariant() const
 {
     Q_D( const PlaylistEntry );
+
+    if ( d->query.isNull() )
+    {
+        return QVariantMap();
+    }
+    else
+    {
         return d->query->toVariant();
     }
+}
 
 
 void