CppunitTest_writerperfect_writer file libmwaw/pass/Acta_1.0.hqx uses the
font "Courier", and for unknown reasons we can't properly load that
font, because the PhysicalFontFamily::mpFirst for "courier" is null.

This causes OutputDevice::GetTextArray() to fail to create a SalLayout
and return early before initializing the passed pDXAry, which then
generates lots of DrMemory warnings.

Let's hope the callers are happy about an all-0 pDXAry.

Change-Id: I07b29a59660cf5cd060fd77da5d96021f9d8f9f5
(cherry picked from commit e6e409b6)
Reviewed-on: https://gerrit.libreoffice.org/20206Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Miklos Vajna <vmiklos@collabora.co.uk>