mexutils version check fix (R14 apparently doesn't define MX_API_VERSION)
mexutils version check fix (R14 apparently doesn't define MX_API_VERSION)

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