packetizer: flac: do better fallback on invalid values (fix #15740)
packetizer: flac: do better fallback on invalid values (fix #15740)

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