this looks like an oversight, just use the baseclass member

Change-Id: Ida36be64266bbc33a6bd1d89dcb665d24a6dd83f
Reviewed-on: https://gerrit.libreoffice.org/49075Reviewed-by: Maxim Monastirsky <momonasmon@gmail.com>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
Tested-by: Noel Grandin <noel.grandin@collabora.co.uk>