fix segfault on missing hset arguments
fix segfault on missing hset arguments

cuixin/ssdb,mlc0202/ssdb,kmiku7/ssdb-annotated,xuecai/ssdb,kyle-wang/ssdb,jackdai123/ssdb,lingdecong/ssdb_study,fengshao0907/ssdb,zkidkid/ssdb,RelicOfTesla/ssdb,xuecai/ssdb,ideawu/ssdb,damujiang/ssdb,ideawu/ssdb,bsn069/ssdb,weizetao/ssdb,kooqilylb/ssdb,exinnet/ssdb,lingdecong/ssdb_study,cherishlm/ssdb,RelicOfTesla/ssdb,Martin404/ssdb,kmiku7/ssdb-annotated,damujiang/ssdb,left2right/ssdb,mlc0202/ssdb,cuixin/ssdb,zkidkid/ssdb,cherishlm/ssdb,xuecai/ssdb,mlc0202/ssdb,zkidkid/ssdb,losywee/ssdb,fengshao0907/ssdb,jackdai123/ssdb,kyle-wang/ssdb,exinnet/ssdb,exinnet/ssdb,xuecai/ssdb,kyle-wang/ssdb,jqk6/ssdb,jqk6/ssdb,cherishlm/ssdb,ideawu/ssdb,jqk6/ssdb,left2right/ssdb,mlc0202/ssdb,lingdecong/ssdb_study,cherishlm/ssdb,losywee/ssdb,fengshao0907/ssdb,deliangyang/ssdb,fengshao0907/ssdb,jqk6/ssdb,jackdai123/ssdb,cloudrain21/ssdb,Martin404/ssdb,deliangyang/ssdb,bsn069/ssdb,Masterlvng/ssdb,ideawu/ssdb,kyle-wang/ssdb,left2right/ssdb,damujiang/ssdb,RelicOfTesla/ssdb,bsn069/ssdb,lhslll/ssdb,deliangyang/ssdb,jackdai123/ssdb,cuixin/ssdb,kyle-wang/ssdb,weizetao/ssdb,losywee/ssdb,kmiku7/ssdb-annotated,kooqilylb/ssdb,lhslll/ssdb,kooqilylb/ssdb,losywee/ssdb,mlc0202/ssdb,kmiku7/ssdb-annotated,Masterlvng/ssdb,kmiku7/ssdb-annotated,RelicOfTesla/ssdb,ideawu/ssdb,left2right/ssdb,exinnet/ssdb,cloudrain21/ssdb,cloudrain21/ssdb,left2right/ssdb,cherishlm/ssdb,bsn069/ssdb,jackdai123/ssdb,weizetao/ssdb,damujiang/ssdb,xuecai/ssdb,lhslll/ssdb,losywee/ssdb,kooqilylb/ssdb,damujiang/ssdb,weizetao/ssdb,RelicOfTesla/ssdb,Masterlvng/ssdb,deliangyang/ssdb,deliangyang/ssdb,cuixin/ssdb,cuixin/ssdb,exinnet/ssdb,Martin404/ssdb,weizetao/ssdb,Martin404/ssdb,zkidkid/ssdb,lhslll/ssdb,lhslll/ssdb,lingdecong/ssdb_study,bsn069/ssdb,Masterlvng/ssdb,Martin404/ssdb,kooqilylb/ssdb,Masterlvng/ssdb,cloudrain21/ssdb,lingdecong/ssdb_study,jqk6/ssdb,fengshao0907/ssdb,cloudrain21/ssdb,zkidkid/ssdb