demux: ts: fix broken mpeg-sl regression (fix #16809)
demux: ts: fix broken mpeg-sl regression (fix #16809)

Worked unintentionally in 2.2.x

xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc