message: Fix by skipping missing delegatees.
diff: @@ -236,13 +236,13 @@ where
  let delegators = bid.delegators_mut();
  for (delegator_key, delegator_reward) in rewards {
  - let delegator_reward_trunc = delegator_reward.to_integer();
  -
  let delegator = match delegators.get_mut(&delegator_key) {
  Some(delegator) => delegator,
  - None => return Err(Error::DelegatorNotFound),
  + None => continue,
  };
  + let delegator_reward_trunc = delegator_reward.to_integer();
  +
  delegator.increase_reward(delegator_reward_trunc)?;
  total_delegator_payout += delegator_reward_trunc;
  