Issue python#112: Prepare Stackless 3.5, fix C-pickle for functions

-  If C-pickle encounters a local function, save_global() now raises AttributeError instead of the documented PicklingError. This commits adapts the Stackless patch to kick in on AttributeError too.

https://bitbucket.org/stackless-dev/stackless/issues/112

Author: Anselm Kruis

Modules/_pickle.c

@@ -3836,7 +3836,8 @@ save(PicklerObject *self, PyObject *obj, int pers_save)
     else if (type == &PyFunction_Type) {
         status = save_global(self, obj, NULL);
 #ifdef STACKLESS
-        if (status < 0 && PyErr_ExceptionMatches(_Pickle_GetGlobalState()->PickleError)) {
+        if (status < 0 && (PyErr_ExceptionMatches(_Pickle_GetGlobalState()->PickleError) ||
+                PyErr_ExceptionMatches(PyExc_AttributeError))) {
             /* fall back to reduce */
             PyErr_Clear();
         }