修改Bug

mqtt_binding/mqtt_binding.go

@@ -42,7 +42,7 @@ func (binding *Binding) AddHandler(topic string, handlers ...router.Handler) err
 		return errors.New("没有传递处理函数")
 	}
 
-	return binding.router.AddTopic(topic, handlers...)
+	return binding.router.AddTopic(binding.router.Group+topic, handlers...)
 }
 
 // BindItem 路由条目结构