gst/mxf/mxfdemux.c: If there's no descriptor for the track in the track's source...

gst/mxf/mxfdemux.c: If there's no descriptor for the track in the track's source package and there's a single descrip...

Original commit message from CVS:
* gst/mxf/mxfdemux.c:
(gst_mxf_demux_handle_header_metadata_resolve_references):
If there's no descriptor for the track in the track's source
package and there's a single descriptor without a linked track
assume that it belongs to this track.