Include stdint.h where necessary
When compiling with GCC 13 and disabling EXIF support the build fails, because
stdint.h
cannot be found. See https://github.com/gentoo/gentoo/pull/31269.
This MR includes stdint.h
where needed. It would be helpful to fix this in the
1.2
branch in addition to the master
branch, so we don't need to apply the
patches downstream in Gentoo.