message: Add negative parameter validation to convolution layers.
diff: @@ -135,6 +135,9 @@ class Conv(Layer):
  if isinstance(filters, float):
  filters = int(filters)
  + if filters < 0:
  + raise ValueError("Recieved a negative value for `filters`,
  + "was expecting a positive value.")
  self.filters = filters
  self.groups = groups or 1
  self.kernel_size = conv_utils.normalize_tuple(
  