Otherwise build breaks on gcc 4.6.

Change-Id: I9f0d94448e31e8b61b271fc088f0ce74128c375b
Reviewed-on: https://gerrit.libreoffice.org/19564Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Michael Stahl <mstahl@redhat.com>
(cherry picked from commit a3b56a4f)