Fix subscriber in tl_detector.py
Fix subscriber in tl_detector.py

PR #7 changed the topic in ros/src/syx/conf.py
from /camera/image_raw to /image_color, but tl_detector.py
was not updated.

ZhuiFengChaseWind/Self-Driving_Car_Capstone,ZhuiFengChaseWind/Self-Driving_Car_Capstone,ZhuiFengChaseWind/Self-Driving_Car_Capstone