[cairo] fbmmx merge

[Billy Biggs]

Carl Worth (cworth at cworth.org):

> But I did run some tests with the cairo patch and things look good. As
> you say, all the tests pass. And the one invalid read error that
> valgrind was seeing in text-antialias-none gets cleared by this patch,
> (at least with gcc4 on my machine).

  I can verify that this invalid read is gone with both the MMX code
enabled and without it.  It was probably a bug in the old ic.c code.

  -Billy