demux: ts: fix regression with incorrect pes headers
demux: ts: fix regression with incorrect pes headers

Just discard dts/pts, not payload.

refs sample OC3.demo.ts #16679

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