[cairo] fix pixman build with intel c/c++ compier

[Soeren Sandmann]

Serhat <ubunturk at gmail.com> writes:

> hi. this is the patch i had pasted into pastebin. it is a commit to my local
> pixman (trunk).
> thx..

I have pushed something based on your patch. It turned out that the
inline compile flags could be replaced with __attribute__
((__always_inline__)) even on GCC.

If you can test with Intel's compiler, I'd appreciate it.

Thanks,
Soren