qtdemux: Do not unref a NULL stream_tags

stream->stream_tags is reset to NULL once we expose the stream and
these have been consumed, we need to check that when cleaning up
the stream.

diff --git a/gst/isomp4/qtdemux.c b/gst/isomp4/qtdemux.c
index ec4a8ad..4116f4c 100644 (file)
--- a/gst/isomp4/qtdemux.c
+++ b/gst/isomp4/qtdemux.c
@@ -2600,7 +2600,9 @@ gst_qtdemux_stream_clear (QtDemuxStream * stream)
     entry->sparse = FALSE;
   }
 
-  gst_tag_list_unref (stream->stream_tags);
+  if (stream->stream_tags)
+    gst_tag_list_unref (stream->stream_tags);
+
   stream->stream_tags = gst_tag_list_new_empty ();
   gst_tag_list_set_scope (stream->stream_tags, GST_TAG_SCOPE_STREAM);
   g_free (stream->redirect_uri);