Validate with zero number is not work about ozzo-validation HOT 3 CLOSED

...
func (r ThresholdRule) Validate(value interface{}) error {
	value, isNil := Indirect(value)
	
	if isNil || IsEmpty(value) { // <---- What's causing the problem
		return nil
	}

	rv := reflect.ValueOf(r.threshold)
	switch rv.Kind() {
	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
		v, err := ToInt(value)
		if err != nil {
			return err
		}
		if r.compareInt(rv.Int(), v) {
			return nil
		}

	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
		v, err := ToUint(value)
		if err != nil {
			return err
		}
		if r.compareUint(rv.Uint(), v) {
			return nil
		}

	...
}
...

...
func (r ThresholdRule) Validate(value interface{}) error {
	value, isNil := Indirect(value)
	
	if isNil { // <--- remove check
		return nil
	}

	rv := reflect.ValueOf(r.threshold)
	switch rv.Kind() {
	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
		v, err := ToInt(value)
		if err != nil {
			return err
		}
		if r.compareInt(rv.Int(), v) {
			return nil
		}

	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
		v, err := ToUint(value)
		if err != nil {
			return err
		}
		if r.compareUint(rv.Uint(), v) {
			return nil
		}

...
}
...

func IsEmpty(value interface{}) bool {
	v := reflect.ValueOf(value)
	switch v.Kind() {
	case reflect.String, reflect.Array, reflect.Map, reflect.Slice:
		return v.Len() == 0
	case reflect.Bool:
		return !v.Bool()
	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
		return v.Int() == 0
	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
		return v.Uint() == 0
	case reflect.Float32, reflect.Float64:
		return v.Float() == 0
	case reflect.Invalid:
		return true
	case reflect.Interface, reflect.Ptr:
		if v.IsNil() {
			return true
		}
		return IsEmpty(v.Elem().Interface())
	case reflect.Struct:
		v, ok := value.(time.Time)
		if ok && v.IsZero() {
			return true
		}
	}

	return false
}

func (u User) Validate() error {
	return validation.ValidateStruct(&u,
		validation.Field(&u.Number1, validation.Required, validation.Max(-1)),
		validation.Field(&u.Number2, validation.Required, validation.Min(1)),
		validation.Field(&u.Number3, validation.NotNil, validation.Max(-1)),
		validation.Field(&u.Number4, validation.NotNil, validation.Min(1)),
	)
}