Make sure the last svd is not truncated by threshold criterium, so that the last U/V that is stashed is diagonal
Make sure the last svd is not truncated by threshold criterium, so that the last U/V that is stashed is diagonal


Former-commit-id: 68ceb5b0df07e543aa267ca689d6759e573ade73
DavidAce/DMRG,DavidAce/DMRG,DavidAce/DMRG,DavidAce/DMRG