reverse Keith's 'XFree86Server' glue.

include/GL/gl.h

@@ -38,11 +38,7 @@
  */
 #if !defined(__SCITECH_SNAP__)
 
-#ifndef XFree86Server
 #include <stddef.h>     /* to get ptrdiff_t, used below */
-#else
-#define ptrdiff_t int
-#endif
 
 #if defined(__BEOS__)
 #include <stdlib.h>     /* to get some BeOS-isms */

include/GL/glext.h

@@ -3290,11 +3290,7 @@ typedef GLboolean (APIENTRYP PFNGLISPROGRAMARBPROC) (GLuint program);
 #define GL_ARB_vertex_buffer_object 1
 /* GL types for handling large vertex buffer objects */
 /* Only used by this extension for now; later needs to be moved earlier in glext.h */
-#ifndef XFree86Server
 #include <stddef.h>
-#else
-#define ptrdiff_t int
-#endif
 typedef ptrdiff_t GLintptrARB;
 typedef ptrdiff_t GLsizeiptrARB;
 #ifdef GL_GLEXT_PROTOTYPES