Going via UNO for a class in the same module is an overkill.

Change-Id: I3a24bc770e40be5b0a6fc34206e92f968de060ae
Reviewed-on: https://gerrit.libreoffice.org/32271Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Jenkins <ci@libreoffice.org>