lavu/utils: silence warnings about incompatible pointer types

Signed-off-by: Paul B Mahol <onemda@gmail.com>
Merge branch 'crypto' of https://github.com/jamrial/FFmpeg

Merged-by: Michael Niedermayer <michaelni@gmx.at>
lavu/hash: Add support for RIPEMD

Signed-off-by: James Almer <jamrial@gmail.com>
lavu/adler32: Fix doxy group definition, take two

The description is for the function, not the group.

Signed-off-by: James Almer <jamrial@gmail.com>
lavu: Add MD4 hashing

Signed-off-by: James Almer <jamrial@gmail.com>