vl_test_fisher.m: fix the reference implementation of the FV
vl_test_fisher.m: fix the reference implementation of the FV

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