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This additionnal patch give a more correct use of
PyArg_ParseTuple

--- socketmodule.c.ori     2005-01-15 23:55:47.000000000 +0100
+++ socketmodule.c      2005-01-16 01:25:54.000000000 +0100
@@ -1106,7 +1106,7 @@
                                args->ob_type->tp_name);
                        return 0;
                }
-               if (!PyArg_ParseTuple(args, "II", &pid,
&groups))
+               if (!PyArg_ParseTuple(args,
"II:getsockaddrarg", &pid, &groups))
                        return 0;
                addr->nl_family = AF_NETLINK;
                addr->nl_pid = pid;