Fixed small bug where iteration number -j (size_t) became inf due to the negative sign
Fixed small bug where iteration number -j (size_t) became inf due to the negative sign


Former-commit-id: 6ce67853f4c216fcd1782faaa73fe0ae8157a02a
DavidAce/DMRG,DavidAce/DMRG,DavidAce/DMRG,DavidAce/DMRG