generic.c: fixes the documentation
generic.c: fixes the documentation

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