tree 07d0c11630d93cff0996b12e715c2f1eafc01ecb
parent b3521c60af03d8adcc5f3b0f6b6555e71315586a
author Cosmin Truta <ctruta@gmail.com> 1705014728 +0200
committer Cosmin Truta <ctruta@gmail.com> 1705014728 +0200

Do not rely on `INT_MAX` in png.h

At a certain step in the configuration process, `gcc -Wundef`
complained about using `INT_MAX` without a definition in png.h,
which is easily fixable with an include.

We would rather not add any extra dependencies to png.h, however,
so we use some unsigned int arithmetic magic instead.