Something

if (source->priv->name == NULL	    || strcmp (name, source->priv->name) != 0	    || source->priv->relative_uri == NULL	    || relative_uri != NULL	    || strcmp (relative_uri, source->priv->relative_uri) != 0) {		g_free (source->priv->name);		source->priv->name = g_strdup (name);		g_free (source->priv->relative_uri);		source->priv->relative_uri = g_strdup (relative_uri);		changed = TRUE;	}