Merge pull request Rayhane-mamah#138 from alex73/patch-2

Fix for tensorflow 1.10

tacotron/models/custom_decoder.py

@@ -40,8 +40,7 @@ def __init__(self, cell, helper, initial_state, output_layer=None):
 		Raises:
 			TypeError: if `cell`, `helper` or `output_layer` have an incorrect type.
 		"""
-		if not rnn_cell_impl._like_rnncell(cell):  # pylint: disable=protected-access
-			raise TypeError("cell must be an RNNCell, received: %s" % type(cell))
+		rnn_cell_impl.assert_like_rnncell(type(cell), cell)
 		if not isinstance(helper, helper_py.Helper):
 			raise TypeError("helper must be a Helper, received: %s" % type(helper))
 		if (output_layer is not None