when all winners in every battle is model A (or model B or tie), the Evaluating will get error at the function of "compute_mle_elo"

[Number18-tong]

when all winners in every battle is model A (or model B or tie), the Evaluating will get error at the line 180 of the function "compute_mle_elo" in utils/score_utils.py. It is possible for the situation that all winners are same type, really hope a way to solve the problem.