message: Fix an error in keras input_layer.Input() dtype type checking.
diff: @@ -77,8 +77,9 @@ class InputLayer(base_layer.Layer):
  dtype = backend.floatx()
  else:
  dtype = backend.dtype(input_tensor)
  - elif input_tensor and input_tensor.dtype != dtype:
  - raise ValueError('`input_tensor.dtype` differs from `dtype`.')
  + elif input_tensor is not None and input_tensor.dtype != dtype:
  + raise ValueError('`input_tensor.dtype` differs from `dtype`: %s vs. %s' %
  + (input_tensor.dtype, dtype))
  super(InputLayer, self).__init__(dtype=dtype, name=name)
  self.built = True
  self.sparse = sparse
  