[quake3] Header file errors

[Asfand Yar Qazi]

> 
> Please, no!
> 
> The OpenGL headers are system headers, and not headers from some
> arbitrary library.

Actually, they're all standard, copied from the reference GL 
implementation from opengl.org.  Since the binary interface is 
standard, the headers will always remain standard.  Its only when new 
features are added, and different versions of the headers are used by 
developers and users, that problems occur.

Anyway, it was just a fleeting idea.  I've had problems in the past 
with dodgy headers while compiling stuff, and have had to update or 
even modify my headers a number of times to make stuff work.