avcodec/mpeg12dec: drop confusing av_dlog()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/jpeglsdec: ask for sample for "oversized image"

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/jpeglsdec/ff_jpegls_decode_lse: check len field validity

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Do not allow writing invalid wav channel layouts by default.

Neither WMP nor QT play wav files with too large channel layouts.
Fixes ticket #3543.
Remove an unneeded include of avassert.h from amr.c.
Fix a typo in amr.c.