[Perl/perl5] 81a3d2: replace croak with NOT_REACHED, add back returnarg

  Branch: refs/heads/yves/hpux_build_warning_suppression
  Home:   https://github.com/Perl/perl5
  Commit: 81a3d26eeea18f2df3ec2da4219e0fce12b4d4a6
      https://github.com/Perl/perl5/commit/81a3d26eeea18f2df3ec2da4219e0fce12b4d4a6
  Author: Yves Orton <demerphq@gmail.com>
  Date:   2023-03-29 (Wed, 29 Mar 2023)

  Changed paths:
    M op.c

  Log Message:
  -----------
  replace croak with NOT_REACHED, add back return arg

• [Perl/perl5] 81a3d2: replace croak with NOT_REACHED, add back returnarg by Yves Orton via perl5-changes