aacdec: Fix calls to avpriv_report_missing_feature().

It does not take log level as an argument.
fate: aac: Add test for AAC-ELD
mem: do not check for negative size

size_t is guaranteed to be unsigned

Signed-off-by: Anton Khirnov <anton@khirnov.net>
fft-test: add a missing #include

stdio.h needed for printf since 7177df90a043bd59e172843fc7cb9e767080ea12
h263: Check init_get_bits return value

And use init_get_bits8 to check for integer overflows while at it.

CC: libav-stable@libav.org
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
h263: Return meaningful errors
configure: Disable -Wmaybe-uninitalized by default

It is by definition unreliable and causes pointless noise on valid
code.
lavc: Edge emulation with dst/src linesize

Allow supporting files for which the image stride is smaller than
the maximum block size + number of subpel mc taps, e.g. a 64x64 VP9
file or a 16x16 VP8 file with -fflags +emu_edge.
lavc: Add a VP9 decoder

Originally written by Ronald S. Bultje <rsbultje@gmail.com> with the
help of Clément Bœsch <ubitux@gmail.com>.

Further contributions by:
Anton Khirnov <anton@khirnov.net>
Luca Barbato <lu_zero@gentoo.org>

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
Signed-off-by: Anton Khirnov <anton@khirnov.net>