Follow-on improvement from previous leak fix.

Change-Id: Iad18da20c3ee03cbafd191ddd722f58bd45911be
Reviewed-on: https://gerrit.libreoffice.org/45538Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Michael Meeks <michael.meeks@collabora.com>
Tested-by: Michael Meeks <michael.meeks@collabora.com>
(cherry picked from commit 268d019c)
Reviewed-on: https://gerrit.libreoffice.org/45661