fix bug in panchro point clouds colorization
fix bug in panchro point clouds colorization

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