message: Add missing "cond" to __slots__
diff: @@ -439,7 +439,7 @@ class HdlWhileStm(iHdlStatement):
  """
  HDL case statement
  """
  - __slots__ = ["params", "body"]
  + __slots__ = ["params", "body", "cond"]
  def __init__(self):
  super(HdlWhileStm, self).__init__()
  