message: Fix ema type mismatch for special ema value.
diff: @@ -473,7 +473,8 @@ class ExponentialMovingAverage(object):
  self._averages[var.ref()] = avg
  with ops.name_scope(self.name) as scope:
  - decay = ops.convert_to_tensor(self._decay, name="decay")
  + decay = ops.convert_to_tensor(
  + self._decay, dtype=dtypes.float32, name="decay")
  if self._num_updates is not None:
  num_updates = math_ops.cast(
  self._num_updates, dtypes.float32, name="num_updates")
  