fix aes hazmat

Author: newpavlov

aes/src/lib.rs

@@ -129,3 +129,5 @@ pub use cipher::{self, BlockCipher, BlockDecrypt, BlockEncrypt, Key, KeyInit};
 
 /// 128-bit AES block
 pub type Block = GenericArray<u8, U16>;
+#[cfg(feature = "hazmat")]
+type Block8 = GenericArray<Block, cipher::generic_array::typenum::U8>;