VSFilter quirk: double-scale widths of opaque boxes
VSFilter quirk: double-scale widths of opaque boxes

VSFilter double-scales the widths of the opaque box in X direction,
which gives much wider boxes than expected (or much less wider boxes)
if ScaleX != 100.  Emulate this behavior, even if it is unbelievably
stupid and no doubt a bug in VSFilter.

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