Fix compilation error for 64-bit OS X by simplifying code

The ifdef for __LP64__ is not needed as far as I can see.

Fixes error: cannot initialize a parameter of type 'const sal_GlyphId
*' (aka 'const unsigned int *') with an lvalue of type 'long *'.

Change-Id: I89d3ba29a5cfd1a89141ec86c873eaf384cf446e