Use memset instead of setting buffers byte by byte
* cipher/cipher-ccm.c (do_cbc_mac): Replace buffer setting loop with memset call. * cipher/cipher-gcm.c (do_ghash_buf): Ditto. * cipher/poly1305.c (poly1305_final): Ditto.
- Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>