[cairo] [PATCH]es for pixman 0.16.0 on Solaris

[M Joonas Pihlaja]

Hi cairo-l,

I've attached a few patches for building pixman 0.16.0 on Solaris 
using Sun Studio 12's C compiler.  The first two seem fairly 
straightforward if slightly ugly tweaks to me, and the last one 
changes the default CFLAGS to be "-O -g" rather than just the "-g" 
given to us by autoconf.  I think this is a more useful default and 
also brings it in line with the long standing autoconf default "-O2 
-g" for gcc.  If there's nothing horribly broken about these to your 
eyes I'd like to go ahead and push them to pixman master.

Cheers,

Joonas