[cairo] Patch to compile w/ VC++ 6

[John Ehresman]

Vladimir Vukicevic wrote:
> Note that at least based on our experiences with libpixman in mozilla,
> VC6 miscompiles various elements in pixman.  In particular, alpha
> blending operations often give very bogus results.  VC71 doesn't
> exibit the problems.  We ended up just compiling pixman with VC71 and
> linking the static library in with our otherwise VC6 build.

That's good to know.  Do you need similar changes to compile with VC71?

Thanks,

John