[cairo] patch for show_glyphs for strings consisting of all spaces

[Keith Packard]

On Fri, 2005-08-12 at 20:31 -0700, Vladimir Vukicevic wrote:
> If a string consisting of all spaces (or other blank characters with
> either width or height 0), the call to
> cairo_clip_intersect_to_rectangle() in _cairo_gstate_show_glyphs blows
> up because, I believe, pixman returns an error due to the 0 width or
> height region.

I fixed one such bug a couple of days ago; pixman_union_rect_with_region
(or whatever it is called) was returning an error when the rectangle was
empty.

-keith

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