Amazingly we fell-back to the old calculation path for
crashes in older LibreOffices, might as well have this on master.

Change-Id: Ifc1de41c93329207d7a1917c736e361d840c2821
Reviewed-on: https://gerrit.libreoffice.org/27166Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Michael Meeks <michael.meeks@collabora.com>