Make crypto_aead test never call random_bytes(0)
Make crypto_aead test never call random_bytes(0)

If random_int(0, x) happens to return 0, test calls random_bytes(0) which is a fatal error.

Thanks to @markw65
jedisct1/libsodium-php,paragonie/libsodium-php,jedisct1/libsodium-php,paragonie/libsodium-php,jedisct1/libsodium-php,paragonie/libsodium-php