[cairo] Re: surface device offsets and clipping

[Vladimir Vukicevic]

Hrm; scratch that, the test works fine in both cases -- for a while
there I was getting an incorrectly clipped bit in the rectangle case,
but it must have been due to some of my other code changes.  I get a
nice solid green surface now.  I've tracked down my problem to
something else entirely... it's currently not possible currently to
migrate a clip to a different surface, which I'm going to have to
solve.

    - Vlad