Fix collisions when hashing structures > 128 bits. (#9)

Author: someone12469

src/lib.rs

@@ -183,7 +183,7 @@ pub mod fast {
                 let hi = (self.sponge >> 64) as u64;
                 self.accumulator = folded_multiply(lo ^ self.accumulator, hi ^ self.fold_seed);
                 self.sponge = x.into();
-                self.sponge_len = 0;
+                self.sponge_len = bits as u8;
             } else {
                 self.sponge |= x.into() << self.sponge_len;
                 self.sponge_len += bits as u8;