inside of constructing SfxInterface(0) by hand

Change-Id: Ic2cbe39366a36b40b672242a250f68135d4e2cd3
Reviewed-on: https://gerrit.libreoffice.org/35892Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>