optipng: security fixes under git

[Bastien Roucariès]

Hi,

I have prepared a three git branch for bookworm/bullseye/buster

These security breach are minor so may be wait for next point release

bastien
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 833 bytes
Desc: This is a digitally signed message part.
URL: <http://alioth-lists.debian.net/pipermail/pkg-phototools-devel/attachments/20240222/8bcc1c76/attachment.sig>