[Perl/perl5] aed82e: speed up regex ops under DEBUGGING when -Dr not used

[Yves Orton via perl5-changes]

  Branch: refs/heads/smoke-me/faster_re_undef_debugging
  Home:   https://github.com/Perl/perl5
  Commit: aed82edfefd77b62108d32ad1739ff4d09566946
      
https://github.com/Perl/perl5/commit/aed82edfefd77b62108d32ad1739ff4d09566946
  Author: Yves Orton <demer...@gmail.com>
  Date:   2021-02-12 (Fri, 12 Feb 2021)

  Changed paths:
    M regcomp.h

  Log Message:
  -----------
  speed up regex ops under DEBUGGING when -Dr not used