When I was reading this code, it wasn't entirely clear to me without
looking at the typedef of oslDirectory whether I was dealing with a
variable or a pointer, so I have changed this to pDirectory. I also
made a small tweak to the whitespace to help readability.

I also changed from explicit comparison to nullptr to the more
conventional style.

Change-Id: I4e9a69575733ab71a175d14a30c1976e6771ed5b
Reviewed-on: https://gerrit.libreoffice.org/39536Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Michael Stahl <mstahl@redhat.com>