add: g_return_if_fail (filename != NULL);
context: bacon_video_widget_set_logo (BaconVideoWidget *bvw, char *filename){	g_return_if_fail (bvw != NULL);	g_return_if_fail (BACON_IS_VIDEO_WIDGET(bvw));	g_return_if_fail (bvw->priv->xine != NULL);	if (bacon_video_widget_open (bvw, filename, NULL) != FALSE) {		bacon_video_widget_play (bvw, NULL);	}}