nil slice decode to empty slice

[mark4z]

What happened:
2022/07/02 23:38:21 original struct {"UserFullName":"mark4z","FamilyPhoneNumber":"010-12345678","Slice":null}
2022/07/02 23:38:21 C�com.company.myuser��user_full_name�familyPhoneNumber�slice`�mark4z010-12345678V�[string�
2022/07/02 23:38:21 decode struct {"UserFullName":"mark4z","FamilyPhoneNumber":"010-12345678","Slice":[]}

What you expected to happen:
nil slice marshal and unMarshal shoulde still equals the 'nil'

How to reproduce it (as minimally and precisely as possible):

type MyUser struct {
	UserFullName      string `hessian:"user_full_name"`
	FamilyPhoneNumber string // default convert to => familyPhoneNumber
	Slice             []string
}

func (MyUser) JavaClassName() string {
	return "com.company.myuser"
}

func main() {
	user := &MyUser{
		UserFullName:      "mark4z",
		FamilyPhoneNumber: "010-12345678",
		Slice:             nil,
	}
	jsonStr, _ := json.Marshal(user)
	log.Printf("original struct %s", jsonStr)
	e := hessian.NewEncoder()
	_ = e.Encode(user)
	buffer := e.Buffer()
	log.Printf("%s", buffer)

	decoder := hessian.NewDecoder(buffer)
	decode, _ := decoder.Decode()
	jsonStr, _ = json.Marshal(decode)
	log.Printf("decode struct %s", jsonStr)
}

Anything else we need to know?:

[mark4z]

[mark4z]

close via #318