Remove unneeded FcPublic
Fix assertion failure

https://bugs.freedesktop.org/show_bug.cgi?id=82220
https://bugs.freedesktop.org/show_bug.cgi?id=82228
If OS/2 table says weight is 1 to 9, multiply by 100

https://bugs.freedesktop.org/show_bug.cgi?id=82228
Trebuchet MS is a sans-serif font, not serif

https://bugs.freedesktop.org/show_bug.cgi?id=82099
Fix previous commit

Ouch!