variable visualPrivates debug problem

[soararing]

hi, when i debug xorg7.1 in 64bit system.
Find a strange phenomenon.
visualPrivates = (void **) 0x0;    
visualPrivates[0] = (void *) 0xf000e81900000001;
 
So whyvisualPrivates values 0?  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.x.org/archives/xorg/attachments/20071009/3a23f096/attachment.html>