The values were not converted to the right unit. Also the
spcPts attribute means an exact value not a minimum one.

Change-Id: Ia49683e66153611e96a830f821e3a2487adec505
Reviewed-on: https://gerrit.libreoffice.org/42763Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Tamás Zolnai <tamas.zolnai@collabora.com>