Fix BorderStyle=3 with zero Outline and Shadow
Fix BorderStyle=3 with zero Outline and Shadow

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