[FFmpeg-cvslog] lavf/mpjpegdec: Fixed dereference after null check

[Alex Agranovsky]

ffmpeg | branch: master | Alex Agranovsky <alex at sighthound.com> | Wed Dec  9 12:48:20 2015 -0500| [7fd1c85e51958050180b37a1bf4ce833d44f91e8] | committer: Michael Niedermayer

lavf/mpjpegdec: Fixed dereference after null check

Fixes Coverity CID 1341576

Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=7fd1c85e51958050180b37a1bf4ce833d44f91e8
---

 libavformat/mpjpegdec.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/libavformat/mpjpegdec.c b/libavformat/mpjpegdec.c
index 3429d19..dd31f87 100644
--- a/libavformat/mpjpegdec.c
+++ b/libavformat/mpjpegdec.c
@@ -260,8 +260,10 @@ static char* mpjpeg_get_boundary(AVIOContext* pb)
     start = mime_type;
     while (start != NULL && *start != '\0') {
         start = strchr(start, ';');
-        if (start)
-            start = start+1;
+        if (!start)
+            break;
+
+        start = start+1;
 
         while (av_isspace(*start))
             start++;