Due the variables above this error, I think this needs to be the .Height, not .Width

Change-Id: If796cd1950f59d0e1a6005c1c1185066c688ef55
Reviewed-on: https://gerrit.libreoffice.org/15748Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Miklos Vajna <vmiklos@collabora.co.uk>