in_mqtt: fix data type for json pack
@@ -114,9 +114,9 @@ static int mqtt_data_append(char *topic, size_t topic_len,
void *in_context)
{
int i;
- int out;
int ret;
int n_size;
+ size_t out;
size_t off = 0;
char *pack;
msgpack_object root;
