[FFmpeg-cvslog] avcodec/cbs_sei: Don't use -1th element of array

[Andreas Rheinhardt]

ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinhardt at gmail.com> | Tue Mar  9 21:29:24 2021 +0100| [12a9f3fc09c7f0ded8be76d66542a88d293663cc] | committer: Andreas Rheinhardt

avcodec/cbs_sei: Don't use -1th element of array

(This affected only suffix SEI messages; yet no such SEI messages are
currently inserted.)

Reviewed-by: Mark Thompson <sw at jkqxz.net>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=12a9f3fc09c7f0ded8be76d66542a88d293663cc
---

 libavcodec/cbs_sei.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/cbs_sei.c b/libavcodec/cbs_sei.c
index c49830ad77..2a96db9674 100644
--- a/libavcodec/cbs_sei.c
+++ b/libavcodec/cbs_sei.c
@@ -166,7 +166,7 @@ static int cbs_sei_get_unit(CodedBitstreamContext *ctx,
         }
         if (i < 0) {
             // No VCL units; just put it at the end.
-            position = -1;
+            position = au->nb_units;
         } else {
             position = i + 1;
         }