vl_imsc.m: make sure that the range is [0,1] exactly
vl_imsc.m: make sure that the range is [0,1] exactly

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