message: fix client.py: check if the feed of string_type is np.array
diff: @@ -417,7 +417,10 @@ class Client(object):
  key)])
  else:
  string_lod_slot_batch.append([])
  + if type(feed_dict[key]) is np.ndarray:
  string_slot.append(feed_dict[key].tostring())
  + else:
  + string_slot.append(feed_dict[key])
  self.has_numpy_input = True
  self.profile_.record('py_prepro_1')
  