Original commit message from CVS:
2004-01-04  Ronald Bultje  <rbultje@ronald.bitfreak.net>

* gst/matroska/matroska-demux.c: (gst_matroska_demux_src_getcaps),
(gst_matroska_demux_add_stream):
* gst/matroska/matroska-ids.h:
Add getcaps() function to fix capsnego...