Fixed bug for RT message garbage in 3.0
Fixed bug for RT message garbage in 3.0

ThomasTimm/ur_modern_driver,Zagitta/ur_modern_driver,UniversalRobots/Universal_Robots_Client_Library,smart-robotics/ur_modern_driver,smart-robotics/ur_modern_driver,Zagitta/ur_modern_driver,Zagitta/ur_modern_driver,ThomasTimm/ur_modern_driver,UniversalRobots/Universal_Robots_Client_Library