[Perl/perl5] 40ea98: Fix leak when smartmatching against a coderef

[Leon Timmermans via perl5-changes]

  Branch: refs/heads/leont/smartmatch-leak
  Home:   https://github.com/Perl/perl5
  Commit: 40ea98369b5185e68df5cedcc7a7b9ceca0de22a
      
https://github.com/Perl/perl5/commit/40ea98369b5185e68df5cedcc7a7b9ceca0de22a
  Author: Leon Timmermans <faw...@gmail.com>
  Date:   2023-08-27 (Sun, 27 Aug 2023)

  Changed paths:
    M pp_ctl.c

  Log Message:
  -----------
  Fix leak when smartmatching against a coderef

Previously, when smartmatching against a code reference, the return
value would be leaked. This fixes that leak.