1. mqtt发布增加异常处理。

mqttdds/Publisher.cxx

@@ -355,7 +355,12 @@ void PublisherApp::run(std::shared_ptr<mqtt::async_client> dev)
                 {
                     if (dev->is_connected())
                     {
-                        std::string payload = "{\"value\": " + std::to_string(info.Value()) + "}";
+                        float weight_value = info.Value();
+                        if (std::isinf(weight_value) || std::isnan(weight_value))
+                        {
+                            weight_value = 0.0;
+                        }
+                        std::string payload = "{\"value\": " + std::to_string(weight_value) + "}";
                         auto mqtt_msg = mqtt::make_message("pound/" + std::string(mqtt_topic_id) + "/scale/weight", payload);
                         mqtt_msg->set_qos(0);
                         mqtt_msg->set_retained(true);