Fix build failure on non-arm 32bit architectures

[helmutg]

An incompatible format triggers -Werror=format-security. %zu is widely available and is the correct type for size_t. The correct format string to be used for uintptr_t is defined in inttypes.h.

When casting from a pointer to an integer, we trip up -Werror=pointer-to-int-cast unless the target integer type has exactly the same size as a pointer.

[P403n1x87]

@helmutg thanks for looking into this. Does this fix need to go into the master branch, or can it go in devel? I understand this is likely needed to build Debian packages. If this has to go on master, I think there are a few commits that might have to be cherry-picked from devel first, to at the very least fix the current state of CI.

For context: the master branch is generally at the state of the last release, whereas all active development happens on the devel branch.

[helmutg]

The Debian package will include the original commit as it would fail to build otherwise. See https://salsa.debian.org/python-team/packages/austin. I've rebased it on devel.

[P403n1x87]

All the Linux tests are failing. From the logs I can see

Cannot get memory maps for pid 3450

which makes me think that this might be related to the changes around the /proc/maps parsing 🤔

[helmutg]

Thanks for pointing at the root cause. I introduced the problem in my rebase onto devel where I messed up converted ADDR_FMT to %zd when it should have been %zx in two occasions.