vl_fisher.c: also fixes OpenMP
vl_fisher.c: also fixes OpenMP

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