>># 
>># 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: dstryimg.m,v 1.3 92/06/11 17:33:55 rws Exp $
>># 
>>#
>>TITLE XDestroyImage CH10
>>ASSERTION B XDestroyImage-1
A call to XDestroyImage frees both the structure and image
data specified by the ximage argument.
>>STRATEGY
For 20 iterations:
   Create an image using XGetImage on the root window.
   Access the region data using XAddPixel.
   Free the structure using XDestroyImage.
   Create an image using XCreateImage.
   Free the structure using XDestroyImage.
