oggstream: Workaround for broken PAR in VP8 BOS
Similarily to the Theora mapping, process 0:N, N:0 and 0:0 pixel aspect ratios as 1:1.
Fixes #719 (closed)
Similarily to the Theora mapping, process 0:N, N:0 and 0:0 pixel aspect ratios as 1:1.
Fixes #719 (closed)