Move frame size setup into ass_reconfigure
Move frame size setup into ass_reconfigure

It isn't needlessly run every frame this way. Also it's cleaner.

astiob/libass,xbmc/libass,vault/libass,Akemi/libass,rhlee/libass,pigoz/libass-ct,sanyaade-g2g-repos/libass,grigorig/libass,Distrotech/libass,xbmc/libass,blinkseb/libass,mwgoldsmith/libass,tgoyne/libass,blinkseb/libass,blinkseb/libass,MrSmile/libass,pigoz/libass-ct,richardpl/libass,stps/libass,MrSmile/libass,ShiftMediaProject/libass,libass/libass,Akemi/libass,Distrotech/libass,asimonov-im/libass,sanyaade-g2g-repos/libass,asimonov-im/libass,Distrotech/libass,torque/libass,sanyaade-g2g-repos/libass,libass/libass,mwgoldsmith/libass,mwgoldsmith/libass,tgoyne/libass,rhlee/libass,richardpl/libass,stps/libass,vault/libass,rhlee/libass,stps/libass,pigoz/libass-ct,tgoyne/libass,astiob/libass,torque/libass,richardpl/libass,ShiftMediaProject/libass,Akemi/libass,grigorig/libass,torque/libass