[FFmpeg-trac] #839(avcodec:open): crash with png (gray) to snow (gray) conversion

[FFmpeg]

#839: crash with png (gray) to snow (gray) conversion
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             Reporter:  ami_stuff   |                    Owner:
                 Type:  defect      |                   Status:  open
             Priority:  important   |                Component:  avcodec
              Version:  git-master  |               Resolution:
             Keywords:  snow gray   |               Blocked By:
             Blocking:              |  Reproduced by developer:  1
Analyzed by developer:  0           |
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Comment (by dbuitenh):

 I have sent a possible fix to the ML.

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/839#comment:2>
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