rotorobj_setkey(): A single string argument is now required (i.e. no
long optional with nearly-no-op missing).
diff --git a/Modules/rotormodule.c b/Modules/rotormodule.c
index d0da590..1985e4c 100644
--- a/Modules/rotormodule.c
+++ b/Modules/rotormodule.c
@@ -767,14 +767,12 @@
 	Rotorobj *self;
 	PyObject * args;
 {
-	char *string = NULL;
+	char *key;
 
-	if (!PyArg_ParseTuple(args, "|s", &string))
+	if (!PyArg_ParseTuple(args, "s", &key))
 		return NULL;
 
-	if (string)
-		set_key(self, string);
-
+	set_key(self, key);
 	Py_INCREF(Py_None);
 	return Py_None;
 }