$NetBSD$

Since this wants to know about the private symbol used by Xlib.h as an
include guard, make sure it knows about both forms.

--- src/Screen.h~	2002-01-15 15:46:43.000000000 +0000
+++ src/Screen.h
@@ -92,7 +92,7 @@ extern	void			RecalculateScreenInfo ( vo
 extern	unsigned char	ScreenMemoryChanged;
 extern	unsigned char	ScreenImageChanged;
 
-#ifdef	_XLIB_H_
+#if defined(_XLIB_H_) || defined(_X11_XLIB_H_)
 
 extern	GC				TtextTextGC;
 extern	GC				TtextMosaicGC;
