Fixed a bug on empty input file
Fixed a bug on empty input file

yanqingmen/Wapiti,Neseb/wapiti,yanqingmen/Wapiti,yanqingmen/Wapiti,yanqingmen/Wapiti,Neseb/wapiti,yanqingmen/Wapiti,Jekub/Wapiti,Jekub/Wapiti