sgidec: use bytestream2_get_bufferu()

Signed-off-by: Paul B Mahol <onemda@gmail.com>
msrledec: use bytestream2_get_bufferu()

Signed-off-by: Paul B Mahol <onemda@gmail.com>
msrledec: use memset()

Signed-off-by: Paul B Mahol <onemda@gmail.com>
wavpackenc: remove duplicate 'const' declaration specifier

Signed-off-by: Paul B Mahol <onemda@gmail.com>
avformat/ftp: make const tables static const

Reviewed-by: Lukasz M <lukasz.m.luki@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>