indeo3: use unaligned reads on reference blocks.

They are not guaranteed to be aligned.
Fixes Bug 503.

CC:libav-stable@libav.org
(cherry picked from commit a97d8cc16e0da30c9ffefa1ede2a0adf3db5f3f8)

Signed-off-by: Reinhard Tartler <siretart@tauware.de>
oma: properly forward errors in oma_read_packet

Prevent spurios EIO on EOF.

CC:libav-stable@libav.org
(cherry picked from commit db9aee6ccf183508835acc325f5ad87d595eacc4)

Signed-off-by: Reinhard Tartler <siretart@tauware.de>
af_asyncts: fix offset calculation

delta is in samples, not bytes. Also the sample format is not guaranteed
to be planar.

CC:libav-stable@libav.org
(cherry picked from commit 16a4a18db089af8c432f1cdec62155000585b72c)

Signed-off-by: Reinhard Tartler <siretart@tauware.de>
update Changelog