[Xorg] Get rid of checkerboard

[Alan Cox]

On Llu, 2004-08-02 at 22:55, Kristian Høgsberg wrote:
> Surely you could use an application for that;  paint the pattern in a 
> fullscreen window. There's no need for that to be the first thing the 
> user sees when he logs in.  At least the option logic could be reversed 
> so it defaults to a black screen.

Black screen is about the worst possible default you can have. A lot of
older analogue tfts can't sync to it. Blue, purple, yellow  whatever
would all be better, even I suspect grey (not tested that).