[cairo] to much roundtrips in the x11 backend

[Carl Worth]

On Mon, 20 Dec 2004 16:05:24 +0100, Alexander Larsson wrote:
> _cairo_xlib_surface_create_similar, which gets called for each glyph
> when rendering text has a roundtrip (XGetGeometry) that is killing
> performance. Here is a fix:

Thanks!

I've committed (a slightly modified version of) this.

-Carl