message: Update convolutional.py
  See issue
diff: @@ -231,6 +231,13 @@ class Conv(Layer):
  if tf_op_name == 'Conv1D':
  tf_op_name = 'conv1d' # Backwards compat.
  + output_shapes = self.compute_output_shape(input_shape).as_list()
  + output_shapes = list(filter((None).__ne__, output_shapes))
  + if not all(output_shapes):
  + raise ValueError('One of the dimensions in output tensor is less than or'
  + ' equal to zero. Please check the input shape. '
  + ' Recieved input: %s'%input_shape)
  +
  self._convolution_op = functools.partial(
  nn_ops.convolution_v2,
  strides=tf_strides,
  