message: fix i16 test_encode
diff: @@ -129,8 +129,8 @@ fn test_write_i8() {
  #[test]
  fn test_write_i16() {
  let mut writer = WriteEncoder::new(&[], Context::new());
  - writer.write_i16(&(-123)).unwrap();
  - assert_eq!([208, 133], writer.get_buffer().as_slice());
  + writer.write_i16(&(-3262)).unwrap();
  + assert_eq!([209, 243, 66], writer.get_buffer().as_slice());
  }
  #[test]
  