mostly to try and track down a crash on exit of sw uwriter under
windows

Change-Id: Id67e93863056da319dd8225038d60a7f5783b103
Reviewed-on: https://gerrit.libreoffice.org/39604Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>