GCM: Use size_t for buffer sizes
* cipher/cipher-gcm.c (ghash, gcm_bytecounter_add, do_ghash_buf) (_gcry_cipher_gcm_encrypt, _gcry_cipher_gcm_decrypt) (_gcry_cipher_gcm_authenticate, _gcry_cipher_gcm_geniv) (_gcry_cipher_gcm_tag): Use size_t for buffer lengths. * cipher/cipher-internal.h (_gcry_cipher_gcm_encrypt) (_gcry_cipher_gcm_decrypt, _gcry_cipher_gcm_authenticate): Use size_t for buffer lengths.
- Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>