mmvideo: check horizontal coordinate too

Fixes out of array accesses.

Bug-Id: CVE-2013-3672
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>
huffyuvdec: check width size for yuv422p

Avoid out of array accesses.

CC: libav-stable@libav.org
Bug-Id: CVE-2013-0848
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>
Merge commit '70cd3b8e659c3522eea5c16a65d14b8658894a94'

* commit '70cd3b8e659c3522eea5c16a65d14b8658894a94':
  mmvideo: check horizontal coordinate too

See: 8d3c99e825317b7efda5fd12e69896b47c700303
Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'a7153444df9040bf6ae103e0bbf6104b66f974cb'

* commit 'a7153444df9040bf6ae103e0bbf6104b66f974cb':
  huffyuvdec: check width size for yuv422p

Conflicts:
	libavcodec/huffyuvdec.c

See: 6abb9a901fca27da14d4fffbb01948288b5da3ba
Merged-by: Michael Niedermayer <michaelni@gmx.at>
avutil/cpu: fix cpu-test to work with ffmpegs cpuflags syntax

Found-by: jamrial
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>