gst/mpegdemux/gstmpegdemux.c: Use the adjusted SCR for calculating the mux rate.
Original commit message from CVS: * gst/mpegdemux/gstmpegdemux.c: (gst_flups_demux_src_query), (gst_flups_demux_parse_pack_start): Use the adjusted SCR for calculating the mux rate. Don't update the rate estimation after a discont.