[libc-commits] [libc] [libc] Fix recently introduced integer-type warnings (PR #125864)

[Peter Smith via libc-commits]

https://github.com/smithp35 approved this pull request.

This looks good to me to avoid the warnings, but worth giving some time for a LLVM libc reviewer to check over it. 

https://github.com/llvm/llvm-project/pull/125864