[libcxx-commits] [libcxx] [libc++] Fix incorrect size check when growing std::string (PR #232737)

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Himadhith wrote:

> > using a custom allocator that uses a 32-bit `size_type`
> 
> libc++'s `basic_string` has `std::min` and `std::max` calls that fail to compile when used with a custom allocator where a value of the `size_type` is subject to integer promotions. If that were not the case, a smaller `size_type` could be used.

Heres' a PR addressing the issue with a fix: https://github.com/llvm/llvm-project/pull/234500. 
CC: @ldionne @philnik777 

https://github.com/llvm/llvm-project/pull/232737