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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@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2016-05-20 17:55:11 +02:00
parent 8e069eb525
commit e7c5dbb4d1
1 changed files with 1 additions and 1 deletions
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libavfilter/avf_ahistogram.c
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@ -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) {