[FFmpeg-cvslog] avfilter/avf_ahistogram: raise minimum acmax to 1

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Fri May 20 17:55:11 2016 +0200| [e7c5dbb4d117591f4ec19a57828155d2009f9bd6] | committer: Michael Niedermayer

avfilter/avf_ahistogram: raise minimum acmax to 1

If acmax can be 0 then it could result in a division by 0
Fixes CID1351345

Reviewed-by: Paul B Mahol <onemda at gmail.com>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=e7c5dbb4d117591f4ec19a57828155d2009f9bd6
---

 libavfilter/avf_ahistogram.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavfilter/avf_ahistogram.c b/libavfilter/avf_ahistogram.c
index a716a96..ff94ad4 100644
--- a/libavfilter/avf_ahistogram.c
+++ b/libavfilter/avf_ahistogram.c
@@ -165,7 +165,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
     const int H = s->histogram_h;
     const int w = s->w;
     int c, y, n, p, bin;
-    uint64_t acmax = 0;
+    uint64_t acmax = 1;
 
     if (!s->out || s->out->width  != outlink->w ||
                    s->out->height != outlink->h) {