Simplify this code a bit

Change-Id: I591484788c5bcb9b9cde9696b149ede7298015a5
Make TTC fonts work again

osl::File::getFileURLFromSystemPath() does not return a boolean. I
wonder how this worked before, if it worked at all.

Change-Id: Iadc0e06236f43c24cbcd42e4fd79ac9116a58c13
Correctly check getFileURLFromSystemPath() success

Change-Id: Iadc34171235fec2d6aafd601f62a0bff8ed5b3ee