Fixed missing leading zero for single digit hex values.
Fixed missing leading zero for single digit hex values.

Closes #39
luoxiaoshenghustedu/GreenDroid,luoxiaoshenghustedu/GreenDroid,hejunbinlan/GreenDroid,DreamZoom/GreenDroid,yangshangwei/GreenDroid,luoxiaoshenghustedu/GreenDroid,wanglj7525/GreenDroid,DreamZoom/GreenDroid,yangshangwei/GreenDroid,HelgePlaschke/GreenDroid,LiuXuApple/GreenDroid,cyrilmottier/GreenDroid,lzy-h2o2/GreenDroid,HelgePlaschke/GreenDroid,LiuXuApple/GreenDroid,wanglj7525/GreenDroid,hejunbinlan/GreenDroid,HelgePlaschke/GreenDroid,wanglj7525/GreenDroid,HelgePlaschke/GreenDroid,luoxiaoshenghustedu/GreenDroid,yangshangwei/GreenDroid,LiuXuApple/GreenDroid,jurihock/voicesmith.greendroid,cyrilmottier/GreenDroid,DreamZoom/GreenDroid,hejunbinlan/GreenDroid,wanglj7525/GreenDroid,lzy-h2o2/GreenDroid,LiuXuApple/GreenDroid,lzy-h2o2/GreenDroid,hejunbinlan/GreenDroid,yangshangwei/GreenDroid,lzy-h2o2/GreenDroid,DreamZoom/GreenDroid,cyrilmottier/GreenDroid