Fixed incorrect result when file size >= 512M.

tests/test.js

@@ -316,6 +316,13 @@
           });
         });
       });
+
+      context('when large size', function () {
+        var hash = algorithm.create();
+        hash.bytes = 4294967295;
+        hash.update('any');
+        expect(hash.hBytes).to.be(1);
+      });
     });
   }