suspected regression from.

commit 11d605cc
Date:   Mon Feb 1 18:39:51 2016 +0200

    tdf#84843 Stop using PseudoSlots for drawing slots

Change-Id: I64aba363f7562c6b16ae1d679968149fea1ba763
Reviewed-on: https://gerrit.libreoffice.org/26909Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Eike Rathke <erack@redhat.com>