gst/rtsp/gstrtspsrc.c: Don't try doing state changes on a NULL pointer.

Original commit message from CVS:
* gst/rtsp/gstrtspsrc.c: (gst_rtspsrc_set_state):
Don't try doing state changes on a NULL pointer.

ChangeLog

+2006-07-15  Tim-Philipp Müller  <tim at centricular dot net>
+
+	* gst/rtsp/gstrtspsrc.c: (gst_rtspsrc_set_state):
+	  Don't try doing state changes on a NULL pointer.
+
 2006-07-14  Wim Taymans  <wim@fluendo.com>
 
 	Patch by: Sebastien Cote <sebas642 at yahoo dot ca>

gst/rtsp/gstrtspsrc.c

@@ -337,10 +337,12 @@ gst_rtspsrc_set_state (GstRTSPSrc * src, GstState state)
     stream = (GstRTSPStream *) streams->data;
 
     /* first our rtp session manager */
-    if ((ret =
-            gst_element_set_state (stream->rtpdec,
-                state)) == GST_STATE_CHANGE_FAILURE)
-      goto done;
+    if (stream->rtpdec) {
+      if ((ret =
+              gst_element_set_state (stream->rtpdec,
+                  state)) == GST_STATE_CHANGE_FAILURE)
+        goto done;
+    }
 
     /* then our sources */
     if (stream->rtpsrc) {