[Xorg] Making small changes to the XAA layer

[Alan Cox]

> > Can't you do that in the SubsequentScanline() function?
> 
> I'd assumed the indirect method was assuming transfer to screen but you
> are right. In fact since it can be filling the next buffer it may
> actually be faster that way too

Ok updated Voodoo driver posted to

	ftp://people.redhat.com/alan/XFree86

This fixes the various bugs I've had reported along the way and
switches to the Scanline functions. I've labelled it "1.0" since I think
its now happily post-beta

Alan