[cairo] Drawing to an X bitmap pixmap

[Martin Pärtel]

> Try not passing in a visual/colormap. The constructor here
> is confusing ... it really wants *either*
>  
>  a visual/colormap
> 
> Or:
> 
>  a standard format
> 
> Regards,
> 					Owen
> 

Thanks. It works now. That should probably be mentioned in the manual 
though.