[fix] Decode empty slices to the default value

Commit for further compatibility with #1353

cjson/decoder.go

@@ -313,6 +313,7 @@ func (dec *Decoder) decodeSlice(pl *payloadIface, rdser *Serializer, v *reflect.
 	var ptr unsafe.Pointer
 
 	k := v.Kind()
+
 	offset := 0
 	switch k {
 	case reflect.Slice:
@@ -331,7 +332,11 @@ func (dec *Decoder) decodeSlice(pl *payloadIface, rdser *Serializer, v *reflect.
 		// offset is 0
 		// No concatenation for the fixed size arrays
 	default:
-		panic(fmt.Errorf("can not convert '%s' to 'array'", v.Type().Kind().String()))
+		if count == 0 { // Allows empty slice for any scalar type (using default value)
+			return
+		} else {
+			panic(fmt.Errorf("can not convert '%s' to 'array'", v.Type().Kind().String()))
+		}
 	}
 
 	if subtag != TAG_OBJECT {
@@ -659,8 +664,10 @@ func (dec *Decoder) decodeValue(pl *payloadIface, rdser *Serializer, v reflect.V
 		switch ctagType {
 		case TAG_ARRAY:
 			count := int(rdser.GetVarUInt())
-			pl.getArray(int(ctagField), *cnt, count, v)
-			*cnt += count
+			if k == reflect.Slice || k == reflect.Array || count != 0 { // Allows empty slice for any scalar type (using default value)
+				pl.getArray(int(ctagField), *cnt, count, v)
+				*cnt += count
+			}
 		default:
 			pl.getValue(int(ctagField), *cnt, v)
 			(*cnt)++