Minor Change ping.py
Minor Change ping.py

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