fixed a calibration file parsing bug
fixed a calibration file parsing bug

davidlandry93/velodyne,pierriko/velodyne,lemiant/velodyne,lemiant/velodyne,wenjiebit/velodyne,pierriko/velodyne,vrabaud/velodyne,jpgr87/velodyne,lemiant/velodyne,vrabaud/velodyne,wenjiebit/velodyne,jpgr87/velodyne,niosus/velodyne,davidlandry93/velodyne,davidlandry93/velodyne,vrabaud/velodyne,wenjiebit/velodyne,jpgr87/velodyne,niosus/velodyne,niosus/velodyne,pierriko/velodyne