Fix ref counts in initialization code.

Doc/ext/noddy.c

@@ -65,5 +65,6 @@ initnoddy(void)
     m = Py_InitModule3("noddy", noddy_methods,
                        "Example module that creates an extension type.");
 
+    Py_INCREF(&noddy_NoddyType);
     PyModule_AddObject(m, "Noddy", (PyObject *)&noddy_NoddyType);
 }

Doc/ext/noddy2.c

@@ -184,5 +184,6 @@ initnoddy2(void)
     if (m == NULL)
       return;
 
+    Py_INCREF(&NoddyType);
     PyModule_AddObject(m, "Noddy", (PyObject *)&NoddyType);
 }

Doc/ext/noddy3.c

@@ -237,5 +237,6 @@ initnoddy3(void)
     if (m == NULL)
       return;
 
+    Py_INCREF(&NoddyType);
     PyModule_AddObject(m, "Noddy", (PyObject *)&NoddyType);
 }