[Perl/perl5] ce9f3c: av_extend_guts: set correct ary_offset when unshif...

[Richard Leach via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: ce9f3c9c0043030e2d05cbb64bbfd4d50fc94b6b
      
https://github.com/Perl/perl5/commit/ce9f3c9c0043030e2d05cbb64bbfd4d50fc94b6b
  Author: Richard Leach <richardle...@users.noreply.github.com>
  Date:   2021-04-05 (Mon, 05 Apr 2021)

  Changed paths:
    M av.c
    M t/op/splice.t

  Log Message:
  -----------
  av_extend_guts: set correct ary_offset when unshifting an array (GH#18667)