[Perl/perl5] 404f1f: io/sem.t: Initialize value to numeric

[James E Keenan]

  Branch: refs/heads/gh-17926-semctl
  Home:   https://github.com/Perl/perl5
  Commit: 404f1f77d57083d80a5fa91fb8deb4043b37b05a
      
https://github.com/Perl/perl5/commit/404f1f77d57083d80a5fa91fb8deb4043b37b05a
  Author: James E Keenan <jkee...@cpan.org>
  Date:   2020-07-07 (Tue, 07 Jul 2020)

  Changed paths:
    M t/io/sem.t

  Log Message:
  -----------
  io/sem.t:  Initialize value to numeric

Per Tony Cook review.

For:  https://github.com/Perl/perl5/issues/17926