func (r *Reader) ReadUint16() uint16 {
	if r.err != nil {
		return 0
	}
	var n int
	n, r.err = io.ReadFull(r.rd, r.b[:2])
	r.cnt += n
	if r.err != nil {
		return 0
	}
	return binary.LittleEndian.Uint16(r.b[:2])
}
func (r *Reader) ReadUint16() uint16 {
	if r.err != nil {
		return 0
	}
	var n int
	n, r.err = io.ReadFull(r.rd, r.b[:2])
	r.cnt += n
	if r.err != nil {
		return 0
	}
	return binary.LittleEndian.Uint16(r.b[:2])
}
// ReadUint16 reads and returns an uint16.