fix disruption update crash
fix disruption update crash

CanalTP/navitia,patochectp/navitia,kadhikari/navitia,kadhikari/navitia,kinnou02/navitia,antoine-de/navitia,Tisseo/navitia,kinnou02/navitia,CanalTP/navitia,antoine-de/navitia,antoine-de/navitia,CanalTP/navitia,pbougue/navitia,xlqian/navitia,xlqian/navitia,CanalTP/navitia,xlqian/navitia,Tisseo/navitia,kinnou02/navitia,CanalTP/navitia,pbougue/navitia,Tisseo/navitia,pbougue/navitia,xlqian/navitia,patochectp/navitia,pbougue/navitia,xlqian/navitia,kadhikari/navitia,antoine-de/navitia,kadhikari/navitia,Tisseo/navitia,Tisseo/navitia,patochectp/navitia,patochectp/navitia,kinnou02/navitia