Make \shad, \xshad and \yshad animatable.
Make \shad, \xshad and \yshad animatable.

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