[cairo] Fix for potential crash in pixman-compose.c

[Bertram Felgenhauer]

Leon Woestenberg wrote:
> On Thu, Feb 14, 2008 at 8:32 AM, Antoine Azar <cairo at antoineazar.com> wrote:
> >  here's a patch that fixes a potential crash in pixman-compose.c when
> >  a box is used in some cases while not allocated or initialized. Mea
> 
> To which pixman releases does this apply?
> 
> -cairo's 1.4.14 pixman copy
> -stand-alone pixman 0.9.6

Neither, it applies to the development head of pixman. The bug was
introduced after the 0.9.6 release.

HTH,

Bertram