[Xorg-driver-geode] more compiler warnings on upcoming X server

[Martin-Éric Racine]

The next Ubuntu release (10.10 Maverick) will ship with X 1.9 and it
brings us a new collection of compiler warnings, all involving usage
of Xalloc and Xfree being marked as deprecated starting with X server
1.9.

I would assume that these will remain available for a couple of X
server release yet but, just to be safe, if we can already safely use
other alloc and free variants, we should consider doing it (though
maybe not for Geode 2.11.9, unless doing it remains back-portable down
to X server 1.4).

Martin-Éric