sd_ass: fix top alignment of secondary subtitles

Secondary subtitle streams (to be shown on the top of the screen along
main subtitle stream) were shown with normal alignment. This is because
we tell libass to override the alignment style (a relatively recent
change, see commit 2f1eb49e). This would behave differently with old
libass versions too.

To escape the mess, just set the alignment explicitly with an override
tag instead of modifying the style.

0 files changed, 0 insertions, 0 deletions