There's no need for an extra function since all debuggin will require a MpegTSPacketizer which means that the GType will be created, therefore move the debug category initialization there.
Fixes #569673.
Original commit message from CVS: * configure.ac: * gst-plugins-bad.spec.in: * gst/mpegdemux/Makefile.am: * gst/mpegdemux/flumpegdemux.c: * gst/mpegdemux/gstmpegdesc.c: * gst/mpegdemux/gstmpegdesc.h: * gst/mpegdemux/mpegtspacketizer.c: * gst/mpegdemux/mpegtspacketizer.h: * gst/mpegdemux/mpegtsparse.c: * gst/mpegdemux/mpegtsparse.h: Move of mpegtsparse to mpegdemux. Fixes #555193.