Make sure font path is valid
Make sure font path is valid

We do not support memory-based fonts yet, so a path is mandatory.

xbmc/libass,sanyaade-g2g-repos/libass,astiob/libass,sanyaade-g2g-repos/libass,stps/libass,torque/libass,ShiftMediaProject/libass,stps/libass,ShiftMediaProject/libass,libass/libass,MrSmile/libass,mwgoldsmith/libass,grigorig/libass,stps/libass,torque/libass,libass/libass,Akemi/libass,torque/libass,Akemi/libass,mwgoldsmith/libass,MrSmile/libass,grigorig/libass,xbmc/libass,sanyaade-g2g-repos/libass,astiob/libass,mwgoldsmith/libass,Akemi/libass