fixes + defualt constructor

include/sta/rtos/queue.hpp

@@ -26,10 +26,13 @@ namespace sta
 		using Message = T;  /**< Queue message type */
 
 	public:
+		// Default Constructor
+		RtosQueue();
+
 		/**
 		 * @param handle CMSIS RTOS2 queue handle
 		 */
-		RtosQueue(osMessageQueueId_t * handle);
+		RtosQueue(osMessageQueueId_t handle);
 
 		/**
 		 * @brief Place message in queue.
@@ -56,7 +59,7 @@ namespace sta
 		uint32_t available() const;
 
 	private:
-		osMessageQueueId_t * handle_;   /**< CMSIS RTOS2 queue handle */
+		osMessageQueueId_t handle_;   /**< CMSIS RTOS2 queue handle */
 	};
 } // namespace sta