cs->message_queue_source = g_source_new ((GSourceFuncs *) &message_queue_funcs,
sizeof (DBusGMessageQueue));
+
+ g_assert (cs->message_queue_source != NULL);
+
((DBusGMessageQueue*)cs->message_queue_source)->connection = connection;
g_source_attach (cs->message_queue_source, cs->context);
}