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avcodec/imgconvert: fix possible null pointer dereference

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regression since 354b26a3945eadd4ed8fcd801dfefad2566241de

(cherry picked from commit 8c2c97403baf95d0facb53f03e468f023eb943e1)
(cherry picked from commit c1e172c2e14ef059dac632f7c67f081dfecd30dc)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Simon Thelen 2018-04-03 14:41:33 +02:00 committed by Michael Niedermayer
parent 9ffbda72c7
commit 03af6ab540
1 changed files with 3 additions and 2 deletions
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5
libavcodec/imgconvert.c
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@ -84,11 +84,12 @@ enum AVPixelFormat avcodec_find_best_pix_fmt_of_list(const enum AVPixelFormat *p
int loss;
for (i=0; pix_fmt_list[i] != AV_PIX_FMT_NONE; i++) {
loss = *loss_ptr;
loss = loss_ptr ? *loss_ptr : 0;
best = avcodec_find_best_pix_fmt_of_2(best, pix_fmt_list[i], src_pix_fmt, has_alpha, &loss);
}
*loss_ptr = loss;
if (loss_ptr)
*loss_ptr = loss;
return best;
}