>># 
>># Copyright 1990, 1991 by the Massachusetts Institute of Technology and
>># UniSoft Group Limited.
>># 
>># Permission to use, copy, modify, distribute, and sell this software and
>># its documentation for any purpose is hereby granted without fee,
>># provided that the above copyright notice appear in all copies and that
>># both that copyright notice and this permission notice appear in
>># supporting documentation, and that the names of MIT and UniSoft not be
>># used in advertising or publicity pertaining to distribution of the
>># software without specific, written prior permission.  MIT and UniSoft
>># make no representations about the suitability of this software for any
>># purpose.  It is provided "as is" without express or implied warranty.
>># 
>># $XConsortium: rtwdw.m,v 1.6 92/06/11 16:01:45 rws Exp $
>># 
>>#
>>TITLE RootWindow CH02
>>ASSERTION A RootWindow-1
A call to RootWindow returns the root window of the screen
specified by the screen_number argument.
>>STRATEGY
Obtain the attributes of the root window of the default screen using XGetWindowAttributes.
Obtain the root window attribute of the default screen using RootWindow.
Verify that the window IDs are the same.
