[Perl/perl5] 5f9b6a: locale.c: Change some int to Size_t

[Karl Williamson via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: 5f9b6ab330440e6f4458b6d48ddc7434719585a2
      
https://github.com/Perl/perl5/commit/5f9b6ab330440e6f4458b6d48ddc7434719585a2
  Author: Karl Williamson <k...@cpan.org>
  Date:   2024-01-22 (Mon, 22 Jan 2024)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Change some int to Size_t

They can't be negative, and this is their proper declaration type