[Health-dev] When health_federation is installed, Creating new Domiciliary Units will show error

[tumashu]

RROR:tryton.common.common:Traceback (most recent call last):
  File "/trytond/wsgi.py", line 73, in dispatch_request
    return endpoint(request, **request.view_args)
  File "/trytond/protocols/dispatcher.py", line 46, in rpc
    request, database_name, *request.rpc_params)
  File "/trytond/wsgi.py", line 44, in auth_required
    return wrapped(*args, **kwargs)
  File "/trytond/protocols/wrappers.py", line 122, in wrapper
    return func(request, pool, *args, **kwargs)
  File "/trytond/protocols/dispatcher.py", line 176, in _dispatch
    result = rpc.result(meth(*c_args, **c_kwargs))
  File "/trytond/model/model.py", line 144, in default_get
    value[field_name] = cls._defaults[field_name]()
  File "/trytond/modules/health/health.py", line 330, in default_address_country
    return int(Fedcountry.country)
TypeError: int() argument must be a string, a bytes-like object or a number, 
not 'NoneType'

Fault: int() argument must be a string, a bytes-like object or a number, not 
'NoneType'