media-factory: require an url

diff --git a/gst/rtsp-server/rtsp-media-factory.c b/gst/rtsp-server/rtsp-media-factory.c
index 29308c0..0861c97 100644 (file)
--- a/gst/rtsp-server/rtsp-media-factory.c
+++ b/gst/rtsp-server/rtsp-media-factory.c
@@ -849,6 +849,7 @@ gst_rtsp_media_factory_create_element (GstRTSPMediaFactory * factory,
   GstElement *result;
 
   g_return_val_if_fail (GST_IS_RTSP_MEDIA_FACTORY (factory), NULL);
+  g_return_val_if_fail (url != NULL, NULL);
 
   klass = GST_RTSP_MEDIA_FACTORY_GET_CLASS (factory);