[libc-commits] [libc] [libc] Fix Cppcheck Issues (PR #96999)

[via libc-commits]

lntue wrote:

@jameshu15869 Do you think we can turn on most of the warning flags together with `Werror` for `benchmark` folder similar to our `src` folder?
https://github.com/llvm/llvm-project/blob/main/libc/cmake/modules/LLVMLibCCompileOptionRules.cmake#L73-L78

https://github.com/llvm/llvm-project/pull/96999