vl_imsmooth: typos in comments
vl_imsmooth: typos in comments

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