[FFmpeg-cvslog] mxfdec: fix NULL pointer dereference in mxf_read_packet_old

[Andreas Cadhalpun]

ffmpeg | branch: release/2.8 | Andreas Cadhalpun <Andreas.Cadhalpun at googlemail.com> | Thu Nov 17 22:53:51 2016 +0100| [8f27508f1cad0adca6486de9265290a6de4e4357] | committer: Andreas Cadhalpun

mxfdec: fix NULL pointer dereference in mxf_read_packet_old

Metadata streams have priv_data set to NULL.

Reviewed-by: Josh de Kock <josh at itanimul.li>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun at googlemail.com>
(cherry picked from commit fdb8c455b637f86e2e85503b7e090fa448164398)
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun at googlemail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=8f27508f1cad0adca6486de9265290a6de4e4357
---

 libavformat/mxfdec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c
index 2fb9335..726d685 100644
--- a/libavformat/mxfdec.c
+++ b/libavformat/mxfdec.c
@@ -3000,7 +3000,7 @@ static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
                 if (mxf->nb_index_tables >= 1 && mxf->current_edit_unit < t->nb_ptses) {
                     pkt->dts = mxf->current_edit_unit + t->first_dts;
                     pkt->pts = t->ptses[mxf->current_edit_unit];
-                } else if (track->intra_only) {
+                } else if (track && track->intra_only) {
                     /* intra-only -> PTS = EditUnit.
                      * let utils.c figure out DTS since it can be < PTS if low_delay = 0 (Sony IMX30) */
                     pkt->pts = mxf->current_edit_unit;