another bug removed in aib.c in the formation of the cluster of null nodes
another bug removed in aib.c in the formation of the cluster of null nodes

qubick/vlfeat,richarddzh/vlfeat,mylxiaoyi/vlfeat,rxl194/vlfeat,vlfeat/vlfeat,rxl194/vlfeat,WangDequan/vlfeat,mylxiaoyi/vlfeat,j-bo/vlfeat,cvfish/vlfeat,WangDequan/vlfeat,rxl194/vlfeat,erexhepa/vlfeat,rxl194/vlfeat,qubick/vlfeat,qubick/vlfeat,qubick/vlfeat,cvfish/vlfeat,j-bo/vlfeat,WangDequan/vlfeat,vlfeat/vlfeat,WangDequan/vlfeat,vlfeat/vlfeat,CansenJIANG/vlfeat,mylxiaoyi/vlfeat,mylxiaoyi/vlfeat,hongzhili/vlfeat,richarddzh/vlfeat,cvfish/vlfeat,CansenJIANG/vlfeat,CansenJIANG/vlfeat,WangDequan/vlfeat,CansenJIANG/vlfeat,erexhepa/vlfeat,hongzhili/vlfeat,vlfeat/vlfeat,erexhepa/vlfeat,richarddzh/vlfeat,hongzhili/vlfeat,qubick/vlfeat,mylxiaoyi/vlfeat,CansenJIANG/vlfeat,qubick/vlfeat,hongzhili/vlfeat,cvfish/vlfeat,hongzhili/vlfeat,erexhepa/vlfeat,richarddzh/vlfeat,WangDequan/vlfeat,rxl194/vlfeat,j-bo/vlfeat,richarddzh/vlfeat,CansenJIANG/vlfeat,cvfish/vlfeat,hongzhili/vlfeat,rxl194/vlfeat,mylxiaoyi/vlfeat,erexhepa/vlfeat,erexhepa/vlfeat,j-bo/vlfeat,j-bo/vlfeat,vlfeat/vlfeat,vlfeat/vlfeat,richarddzh/vlfeat,cvfish/vlfeat