There is an updated pull request by sgn against master on the void-packages repository

https://github.com/chexum/void-packages libotr-regression
https://github.com/void-linux/void-packages/pull/37563

libotr: make it compile/test with new tools
An irssi update triggered a build of libotr on my system.  It seems the package does
no longer builds.  It was last updated several years ago, toolset was likely more
lax then.

The patch is only needed for the regression test (which is ran by default), so the
code changes don't warrant an actual respin of the binary, it's just needed so
that it can be built from scratch again.

In case other archs fail, I'll check what I can do.

#### Testing the changes
- I tested the changes in this PR: **briefly**

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#### Local build testing
- [x] I built this PR locally for my native architecture, (x86_64-glibc)
- [ ] I built this PR locally for these architectures (if supported. mark crossbuilds):
  - aarch64-musl
  - armv7l
  - armv6l-musl


A patch file from https://github.com/void-linux/void-packages/pull/37563.patch is attached