[cairo] [PATCH] Test compositing alpha-only surfaces

[Chris Wilson]

Excerpts from Andrea Canciani's message of Sun Nov 08 14:02:08 +0000 2009:
> I've been asked to use a different licence. Here is the same code
> (except for a couple of trailing whitespaces I removed) with a
> (hopefully) better licencing.

Thank you Andrea, pushed to master.
-ickle
-- 
Chris Wilson, Intel Open Source Technology Centre