Revert "libmp3lame: use the correct remaining buffer size when flushing"

This reverts commit 5dbb3298b9c1d7beb41c7d3ab19f86d6e027e43d, which was
mistakenly backported.
roqvideodec: fix a potential infinite loop in roqvideo_decode_frame().

When there is just 1 byte remanining in the buffer, nothing will be read
and the loop will continue forever. Check that there are at least 8
bytes, which are always read at the beginning.

CC:libav-stable@libav.org
(cherry picked from commit 3e2f200237af977b9253b0aff121eee27bcedb44)

Signed-off-by: Reinhard Tartler <siretart@tauware.de>
(cherry picked from commit 747fbe0c212b81952bb27ec7b99fa709081e2d63)

Conflicts:

	libavcodec/roqvideodec.c
ivi_common: do not call MC for intra frames when dc_transform is unset

CC:libav-stable@libav.org
(cherry picked from commit 3ba40ebb6cc58753dc3746c718203bb31760deba)

Signed-off-by: Reinhard Tartler <siretart@tauware.de>
(cherry picked from commit 74880e78d83031d612c941a383b810ff0c9d50c6)

Signed-off-by: Reinhard Tartler <siretart@tauware.de>
wmaprodec: require block_align to be set.

Avoids an infinite loop in the calling programs with decoder not
consuming any input and not returning output.

CC:libav-stable@libav.org
(cherry picked from commit cacad1c058f66558ec727faac3b277d2dee264d4)

Signed-off-by: Reinhard Tartler <siretart@tauware.de>
(cherry picked from commit 20373a66ec68d958c266f643a7d0e5ec254c0fcc)

Signed-off-by: Reinhard Tartler <siretart@tauware.de>
Update Changelog for the 0.8.6 Release