[Perl/perl5] 5e402b: locale.c: Macroize setting errno

[Karl Williamson via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: 5e402bd41a1fd451fae891553e1688124dad1aee
      
https://github.com/Perl/perl5/commit/5e402bd41a1fd451fae891553e1688124dad1aee
  Author: Karl Williamson <k...@cpan.org>
  Date:   2023-03-04 (Sat, 04 Mar 2023)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Macroize setting errno

Some of the code in this file calls SETERRNO(), and some doesn't.  This
commit makes them all consistent to use SETERRNO, if EINVAL is present
on the platform