[Perl/perl5] 6fc548: regcomp.c: Zero width constructs shouldn't be SIMPLE

[Karl Williamson via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: 6fc5487b6505404743d354980d786d2a80868c0c
      
https://github.com/Perl/perl5/commit/6fc5487b6505404743d354980d786d2a80868c0c
  Author: Karl Williamson <k...@cpan.org>
  Date:   2020-10-15 (Thu, 15 Oct 2020)

  Changed paths:
    M regcomp.c

  Log Message:
  -----------
  regcomp.c: Zero width constructs shouldn't be SIMPLE

This is reserved for length-1 constructs.