Defining new members in DeviceProxy has side effects

Defining new members in DeviceProxy (ex: by inheriting from DeviceProxy) causes DeviceProxy to define State and Status as properties instead of methods:

    from PyTango import DeviceProxy
    class D(DeviceProxy):
        def __ini__(self, *a, **ka):
            super(D, self).__init__(*a, **ka):
            self.bla = 1234

    >>> d_ok = DeviceProxy('sys/tg_test/1')
    >>> print d_ok.State()
    ON

    >>> d_err = D('sys/tg_test/1')
    >>> print d_err.State()
    TypeError: 'DevState' object is not callable

This problem occurs only in PyTango 9.x. Thanks to Laurent Farvacque (ESRF) for reporting the problem