vui information is present flag parses incorrectly for HEVC sps

[RufaelDev]

I have experienced the case where incorrectly the HEVC sps vui information present is parsed incorrectly in the ISOSegment validator, with ffmpeg can easily verify that the flag is set: ffmpeg -i in.mfv -c copy -bsf:v trace_headers -f null - 2> extract_NALUS.txt

streams occur in dvb hdr materials: https://dvb-2017-dm.s3.eu-central-1.amazonaws.com/dolby.mpd https://dvb-2017-dm.s3.eu-central-1.amazonaws.com/philips.mpd

the xml output of ISOSegmentvalidator signals vui information present as 0 while it should be 1 It happenned on all streams.