slic.c: minor doc fix
slic.c: minor doc fix

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