Assume pixel ratio equals aspect ratio
Assume pixel ratio equals aspect ratio

In ass_set_frame_size pixel_ratio will be set alongside aspect ratio to
the same value.  This makes it possible to use libass without
explicitely specifying an aspect ratio.

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