check if matchfile is not empty before loading it in numpy
check if matchfile is not empty before loading it in numpy

dyoussef/s2p,MISS3D/s2p,MISS3D/s2p,dyoussef/s2p,jmichel-otb/s2p,carlodef/s2p,mnhrdt/s2p,jmichel-otb/s2p,jmichel-otb/s2p,dyoussef/s2p,jmichel-otb/s2p,mnhrdt/s2p,MISS3D/s2p,MISS3D/s2p,dyoussef/s2p,carlodef/s2p