[FIX] user: avoid duplication on select extendted group from user preferences

bzr revid: hmo@tinyerp.com-20100710094352-2hos3xce8cp854ah

bin/addons/base/res/res_user.py

@@ -183,7 +183,16 @@ class users(osv.osv):
             return False
         group_obj = self.pool.get('res.groups')
         extended_group_id = group_obj.get_extended_interface_group(cr, uid, context=context)
-        self.write(cr, uid, ids, { 'groups_id': [((3 if value == 'simple' else 4), extended_group_id)]}, context=context)
+        if type(ids) in (int,long,):
+            ids = [ids]
+        if value != 'simple':
+            #To avoid insert duplication extended group
+            for user in self.browse(cr, uid, ids, context=context):
+                group_ids = map(lambda x:x.id, user.groups_id)
+                if extended_group_id not in group_ids:
+                    self.write(cr, uid, [user.id], {'groups_id': [(4, extended_group_id)]}, context=context)
+        else:
+            self.write(cr, uid, ids, {'groups_id': [(3, extended_group_id)]}, context=context)
         return True