_in_range_inclusive class method incorrectly called isinstance

salt/modules/win_lgpo.py

@@ -1868,6 +1868,11 @@ class _policy_info(object):
         '''
         minimum = 0
         maximum = 1
+        if isinstance(val, string_types):
+            if val.lower() == 'not defined':
+                return True
+            else:
+                return False
         if 'min' in kwargs:
             minimum = kwargs['min']
         if 'max' in kwargs: