Fixed the enum class in the ptypes.pint library module to raise a ptypes.error exception when an enumeration's values are of an incorrect type.
Fixed the enum class in the ptypes.pint library module to raise a ptypes.error exception when an enumeration's values are of an incorrect type.

arizvisa/syringe,arizvisa/syringe,arizvisa/syringe,arizvisa/syringe,arizvisa/syringe