instead of unique_ptr as in commit
7bc1c79c

Change-Id: I4e57378a333455b818162c6cc8484be9dcaddb03
Reviewed-on: https://gerrit.libreoffice.org/26236Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noelgrandin@gmail.com>