webdoc.py: fix bug yielding incorrect TOCs
webdoc.py: fix bug yielding incorrect TOCs

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