In the tiled rendering case the map mode is disabled,
and conversion pixel to logical is not computed.

Change-Id: I0d54aaa897f0fe0df6e8b55334053dc66b6ea925
Reviewed-on: https://gerrit.libreoffice.org/20912Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Henry Castro <hcastro@collabora.com>