fix a regression caused by #113: lx add .torrent fails
fix a regression caused by #113: lx add .torrent fails

ccagg/xunlei,GeassDB/xunlei-lixian,sndnvaps/xunlei-lixian,myself659/xunlei-lixian,wangjun/xunlei-lixian,davies/xunlei-lixian,liujianpc/xunlei-lixian,xieyanhao/xunlei-lixian,sdgdsffdsfff/xunlei-lixian,iambus/xunlei-lixian,wogong/xunlei-lixian,windygu/xunlei-lixian