The types 'long' and 'unsigned long' are different sizes on different
platforms, making them wholy unsuitable for portable code.
And when I mean different sizes, I mean 64bit Linux and 64bit Windows
have different bit sizes.

Change-Id: Id4d8cd709bf71a3f85ed6515fae2b0a21ae8c25d
Reviewed-on: https://gerrit.libreoffice.org/41130Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>