GH-131296: fix clang-cl warning on Windows in semaphore.c

[chris-eibl]

I think this is a skip news?

Fixes https://github.com/python/cpython/actions/runs/14006628024/job/39221297660#step:4:259

..\Modules\_multiprocessing\semaphore.c(636,36): warning : incompatible pointer types passing 'int *' 
to parameter of type 'long *' [-Wincompatible-pointer-types] [D:\a\cpython\cpython\PCbuild\_multiprocessing.vcxproj]
..\Modules\_multiprocessing\semaphore.c(668,36): warning : incompatible pointer types passing 'int *'
to parameter of type 'long *' [-Wincompatible-pointer-types] 

• Issue: clang-cl issues many warnings when building on Windows #131296