playbin: fix 'attempt to unlock mutex that was not locked' in error code path

Fixes playbin unit test with latest GLib.

diff --git a/gst/playback/gstplaybin2.c b/gst/playback/gstplaybin2.c
index 75499a1..ca5bb25 100644 (file)
--- a/gst/playback/gstplaybin2.c
+++ b/gst/playback/gstplaybin2.c
@@ -5201,6 +5201,7 @@ no_decodebin:
 uridecodebin_failure:
   {
     GST_DEBUG_OBJECT (playbin, "failed state change of uridecodebin");
+    GST_SOURCE_GROUP_LOCK (group);
     goto error_cleanup;
   }
 sink_failure: