[Perl/perl5] 81d9b3: locale.c: S_save_to_buffer: Add pTHX parameter

[Karl Williamson via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: 81d9b3207b262c36910e83706fd1013947a578c4
      
https://github.com/Perl/perl5/commit/81d9b3207b262c36910e83706fd1013947a578c4
  Author: Karl Williamson <k...@cpan.org>
  Date:   2023-08-13 (Sun, 13 Aug 2023)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: S_save_to_buffer: Add pTHX parameter

This saves doing dTHX inside the function