>># 
>># 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: crtimg.m,v 1.6 92/06/11 17:33:24 rws Exp $
>># 
>>#
>>TITLE XCreateImage CH10
>>ASSERTION A XCreateImage-1
A call to XCreateImage allocates and returns an XImage
structure.
>>STRATEGY
For format XYPixmap and ZPixmap:
   Create an XImage structure using XCreateImage.
   Verify that the call did not return NULL.
   Verify that the structure components set from the parameters are set correctly.
>>ASSERTION B XCreateImage-2
When sufficient storage cannot be allocated, then a call to
XCreateImage returns NULL.
>>STRATEGY
Report UNTESTED
>>ASSERTION A XCreateImage-3
When the bytes_per_line argument is zero, then scanlines
are assumed to be contiguous.
>>STRATEGY
For format XYPixmap and ZPixmap:
   Create an XImage structure using XCreateImage with bytes_per_line argument set to zero.
   Verify that the call did not return NULL.
   Verify that the bytes_per_line component of the structure is correct.
