gst/id3demux/: On second thought, it might be wiser and more efficient not to do tag registration from a streaming th...

Original commit message from CVS:
* gst/id3demux/gstid3demux.c: (plugin_init):
* gst/id3demux/id3tags.c:
(id3demux_add_id3v2_frame_blob_to_taglist):
* gst/id3demux/id3tags.h:
On second thought, it might be wiser and more efficient
not to do tag registration from a streaming thread.