which in turn triggered some loplugin:useuniqueptr

Change-Id: I0c38561fc9b68dac44e8cf58c8aa1f582196cc64
Reviewed-on: https://gerrit.libreoffice.org/38281Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>