glx: use glFunction()

[George Sapountzis]

Hi,

This is about using glFunction() calls instead of the CALL_Function(
GET_DISPATCH(), () ) macros. Obviously, this is code clarity vs. call
overhead and RSS overhead, hopefully, it can be done on a case-by-case
basis where it makes sense. I put patches at
http://people.freedesktop.org/~gsap7/xgl/ for an example conversion of
glxcmds.c and glxdri.c, the patches are on top of the glapi sync
patches at http://people.freedesktop.org/~gsap7/glapi/ . I am posting
because I thought it may be useful in some cases.

regards,
George.