[Perl/perl5] 08cb8d: Configure: Handle case of no localeconv() found

[Karl Williamson via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: 08cb8dc811173a8180d7ea8c58ba9f609d1a4e42
      
https://github.com/Perl/perl5/commit/08cb8dc811173a8180d7ea8c58ba9f609d1a4e42
  Author: Karl Williamson <k...@cpan.org>
  Date:   2024-01-15 (Mon, 15 Jan 2024)

  Changed paths:
    M Configure

  Log Message:
  -----------
  Configure: Handle case of no localeconv() found

If not found, there certainly won't be a subset of its returns