[Perl/perl5] 2dc676: Don't panic if can't destroy mutex during global d...

[Karl Williamson via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: 2dc676e9ce23feb0ae948ea62f7e4301931d2188
      
https://github.com/Perl/perl5/commit/2dc676e9ce23feb0ae948ea62f7e4301931d2188
  Author: Karl Williamson <k...@cpan.org>
  Date:   2023-01-12 (Thu, 12 Jan 2023)

  Changed paths:
    M thread.h

  Log Message:
  -----------
  Don't panic if can't destroy mutex during global destruction

It's going to be destroyed anyway; this just obscures what the real
failure might be.