[compiz] Minor fix to multi-head changes for mixed resolutions

[David Reveman]

On Wed, 2006-11-01 at 08:45 -0800, Shawn Starr wrote:
> Hi David, 
> 
> I have a dual-head right now and I'm about to compile compiz git to test. Does your recent changes make separate cubes now for each screen?

If all heads have the same resolution, it will look like they are
separate views of the same cube. If all heads aren't running at the same
resolution, it will look like they are different cubes (currently broken
though, I'll fix it later today)

Once we have input transformation support in the server we'll be able to
do much more interesting things.

-David