minor change in read_write_node.cpp
minor change in read_write_node.cpp

ROBOTIS-GIT/DynamixelSDK,ROBOTIS-GIT/DynamixelSDK,ROBOTIS-GIT/DynamixelSDK,ROBOTIS-GIT/DynamixelSDK,ROBOTIS-GIT/DynamixelSDK,ROBOTIS-GIT/DynamixelSDK,ROBOTIS-GIT/DynamixelSDK