[Perl/perl5] fc9696: locale.c: Don't compile get_displayable_string if ...

[Karl Williamson via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: fc9696a5e55c64ae01cfd7890d3b832cb309b822
      
https://github.com/Perl/perl5/commit/fc9696a5e55c64ae01cfd7890d3b832cb309b822
  Author: Karl Williamson <k...@cpan.org>
  Date:   2022-10-18 (Tue, 18 Oct 2022)

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

  Log Message:
  -----------
  locale.c: Don't compile get_displayable_string if unused

This was generating warnings on several different platforms