ports/76257: nvidia_driver breaks xorg-clients build

[Mikhail Teterin]

> Could you try if the attached patch against xdriinfo.c works with
> NVidia's GLX? If it does, then I'll commit this to Xorg CVS.

Using glXGetProcAddressARB instead of glXGetProcAddress allows the
utility to build, but it still does not work -- the calls return NULL at
run-time.

If your program only works with Xorg's GLX, than, indeed, the error
message may need to become more informative.

If, on the other hand, using the glXGetProcAddressARB works when linked
with Xorg's GLX -- why bother with the #ifdefs at all? Just use the old
call for the time being. :-)

	-mi

> --- ./xdriinfo.c.~1.1.3.1.~	2004-06-16 11:27:39.000000000 +0200
> +++ ./xdriinfo.c	2005-02-21 22:50:37.000000000 +0100
> @@ -28,6 +28,14 @@
>  #include <unistd.h>
>  #include <string.h>
>  
> +#ifdef GLX_VERSION_1_4
> +#   define GLX_GET_PROC_ADDRESS(name) \
> +        glXGetProcAddress((const GLubyte *)(name))
> +#else
> +#   define GLX_GET_PROC_ADDRESS(name) \
> +        glXGetProcAddressARB((const GLubyte *)(name))
> +#endif
> +
>  typedef const char * glXGetScreenDriver_t (Display *dpy, int scrNum);
>  typedef const char * glXGetDriverConfig_t (const char *driverName);
>  
> @@ -57,10 +65,13 @@