[Perl/perl5] a9fcf3: op.c - use OP_REFCNT_ macros to guard rcpv refcoun...

[Yves Orton via perl5-changes]

  Branch: refs/heads/yves/cop_file_rcpv
  Home:   https://github.com/Perl/perl5
  Commit: a9fcf3b360cab42aa2ba9baef6c34b040796c939
      
https://github.com/Perl/perl5/commit/a9fcf3b360cab42aa2ba9baef6c34b040796c939
  Author: Yves Orton <demer...@gmail.com>
  Date:   2022-10-30 (Sun, 30 Oct 2022)

  Changed paths:
    M op.c
    M op.h

  Log Message:
  -----------
  op.c - use OP_REFCNT_ macros to guard rcpv refcount changes

github revealed that it is possible for a race condition on
updating the refcounts that I did not notice.