[FFmpeg-cvslog] avutil/mathematics: Fix division by 0

[Michael Niedermayer]

ffmpeg | branch: release/2.4 | Michael Niedermayer <michael at niedermayer.cc> | Wed Dec  9 17:39:38 2015 +0100| [ab70292fd0c35d1c308f6cdbb810746edf644233] | committer: Michael Niedermayer

avutil/mathematics: Fix division by 0

Fixes: CID1341571

Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit bc8b1e694cc395fdf5e2917377ef11263c937d85)

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

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=ab70292fd0c35d1c308f6cdbb810746edf644233
---

 libavutil/mathematics.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavutil/mathematics.c b/libavutil/mathematics.c
index 4d8467b..78a87d8 100644
--- a/libavutil/mathematics.c
+++ b/libavutil/mathematics.c
@@ -90,7 +90,7 @@ int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding rnd)
         else {
             int64_t ad = a / c;
             int64_t a2 = (a % c * b + r) / c;
-            if (ad >= INT32_MAX && ad > (INT64_MAX - a2) / b)
+            if (ad >= INT32_MAX && b && ad > (INT64_MAX - a2) / b)
                 return INT64_MIN;
             return ad * b + a2;
         }