Fixed bug in movie cloning (crash in DASH with MPEG-4 Systems tracks)
Fixed bug in movie cloning (crash in DASH with MPEG-4 Systems tracks)

DmitrySigaev/gpac-sf,DmitrySigaev/gpac-sf,DmitrySigaev/gpac-sf,DmitrySigaev/gpac-sf,DmitrySigaev/gpac-sf,DmitrySigaev/gpac-sf