fix(dpmodel): fix natoms[0] bug, einsum, and return type in EnergyLoss#5325

njzjz merged 1 commit intodeepmodeling:masterdeepmodeling/deepmd-kit:masterfrom

wanghan-iapcm:chore-dp-loss-utwanghan-iapcm/deepmd-kit:chore-dp-loss-utCopy head branch name to clipboard