-launch: disable CLOCK_LOST message handling

Disable the handling of the CLOCK_LOST messages until we fixed and released the
elements (rtspsrc) that break when we quickly PAUSE/PLAY the pipeline.

Fixes #579127

tools/gst-launch.c

@@ -439,9 +439,14 @@ event_loop (GstElement * pipeline, gboolean blocking, GstState target_state)
         break;
       }
       case GST_MESSAGE_CLOCK_LOST:
+#if 0
+        /* disabled for now as it caused problems with rtspsrc. We need to fix
+         * rtspsrc first, then release -good before we can reenable this again
+         */
         g_print ("Clock lost, selecting a new one\n");
         gst_element_set_state (pipeline, GST_STATE_PAUSED);
         gst_element_set_state (pipeline, GST_STATE_PLAYING);
+#endif
         break;
       case GST_MESSAGE_EOS:
         waiting_eos = FALSE;