Update limitholdem_rule_models.py

Former-commit-id: a0d6e0e

rlcard/models/limitholdem_rule_models.py

@@ -109,7 +109,7 @@ def step(self, state):
  def eval_step(self, state):
  ''' Step for evaluation. The same to step
  '''
- return self.step(state)
+ return self.step(state), []
 
 class LimitholdemRuleModelV1(Model):
  ''' Limitholdem Rule Model version 1