3.6: Revert pixman to pre-float optimizations
3.6: Revert pixman to pre-float optimizations

GCC 4.6 is barfing on the inlining; it appears to be treating it as
"fail if you can't inline", which is kind of lame.

vrutkovs/vrutkovs.github.io,chergert/gnome-continuous,chergert/gnome-continuous,GNOME/gnome-ostree,GNOME/gnome-ostree,djdeath/gnome-ostree,djdeath/gnome-ostree,djdeath/gnome-ostree,GNOME/gnome-ostree,chergert/gnome-continuous,vrutkovs/vrutkovs.github.io,vrutkovs/vrutkovs.github.io