packetizer: h264_nal: fix get_avcC_to_AnnexB_NAL_size
packetizer: h264_nal: fix get_avcC_to_AnnexB_NAL_size

Only the SPS was detected.

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