Use plain Pyston implementation of PyObject_GenericGetAttr in ExtensionClass.

In zope ExtensionClass, it just copied and inlined the codes from CPython's
PyObject_GenericGetAttr and _PyObject_GetDictPtr. Which are not work for Pyston.
So just call correspond function in Pyston.

src/ExtensionClass/_ExtensionClass.c

@@ -45,7 +45,9 @@ Base_getattro(PyObject *obj, PyObject *name)
 {
   /* This is a modified copy of PyObject_GenericGetAttr.
      See the change note below. */
-
+    PyObject *res = PyObject_GenericGetAttr(obj, name);
+    return res;
+#if 0
 	PyTypeObject *tp = obj->ob_type;
 	PyObject *descr = NULL;
 	PyObject *res = NULL;
@@ -123,51 +125,51 @@ Base_getattro(PyObject *obj, PyObject *name)
 	}
 
 	/* Inline _PyObject_GetDictPtr */
-	dictoffset = tp->tp_dictoffset;
-	if (dictoffset != 0) {
-		PyObject *dict;
-		if (dictoffset < 0) {
-			int tsize;
-			size_t size;
-
-			tsize = ((PyVarObject *)obj)->ob_size;
-			if (tsize < 0)
-				tsize = -tsize;
-			size = _PyObject_VAR_SIZE(tp, tsize);
-
-			dictoffset += (long)size;
-			assert(dictoffset > 0);
-			assert(dictoffset % SIZEOF_VOID_P == 0);
-		}
-		dictptr = (PyObject **) ((char *)obj + dictoffset);
-		dict = *dictptr;
-		if (dict != NULL) {
-			Py_INCREF(dict);
-			res = PyDict_GetItem(dict, name);
-			if (res != NULL) {
-				Py_INCREF(res);
-				Py_XDECREF(descr);
-				Py_DECREF(dict);
-
-                          /* CHANGED!
-                             If the tp_descr_get of res is of_get, 
-                             then call it. */
-
-                          if (PyObject_TypeCheck(res->ob_type,
-                                                 &ExtensionClassType)
-                              && res->ob_type->tp_descr_get != NULL) {
-                            PyObject *tres;
-                            tres = res->ob_type->tp_descr_get(
-                                                 res, obj, 
-                                                 OBJECT(obj->ob_type));
-                            Py_DECREF(res);
-                            res = tres;
-                          }
-                          goto done;
-			}
-			Py_DECREF(dict);
-		}
-	}
+	    dictoffset = tp->tp_dictoffset;
+        if (dictoffset != 0) {
+            PyObject *dict;
+            if (dictoffset < 0) {
+                int tsize;
+                size_t size;
+
+                tsize = ((PyVarObject *)obj)->ob_size;
+                if (tsize < 0)
+                    tsize = -tsize;
+                size = _PyObject_VAR_SIZE(tp, tsize);
+
+                dictoffset += (long)size;
+                assert(dictoffset > 0);
+                assert(dictoffset % SIZEOF_VOID_P == 0);
+            }
+            dictptr = (PyObject **) ((char *)obj + dictoffset);
+            dict = *dictptr;
+            if (dict != NULL) {
+                Py_INCREF(dict);
+                res = PyDict_GetItem(dict, name);
+                if (res != NULL) {
+                    Py_INCREF(res);
+                    Py_XDECREF(descr);
+                    Py_DECREF(dict);
+
+                    /* CHANGED!
+                       If the tp_descr_get of res is of_get, 
+                       then call it. */
+
+                    if (PyObject_TypeCheck(res->ob_type,
+                                &ExtensionClassType)
+                            && res->ob_type->tp_descr_get != NULL) {
+                        PyObject *tres;
+                        tres = res->ob_type->tp_descr_get(
+                                res, obj, 
+                                OBJECT(obj->ob_type));
+                        Py_DECREF(res);
+                        res = tres;
+                    }
+                    goto done;
+                }
+                Py_DECREF(dict);
+            }
+        /* } */
 
 	if (f != NULL) {
 		res = f(descr, obj, (PyObject *)obj->ob_type);
@@ -182,10 +184,11 @@ Base_getattro(PyObject *obj, PyObject *name)
 	}
 
         /* CHANGED: Just use the name. Don't format. */
-        PyErr_SetObject(PyExc_AttributeError, name);
+        PyErr_SetObject(PyExc_AttributeError, PyString_FromString("Are you kidding me?"));
   done:
 	Py_DECREF(name);
 	return res;
+#endif
 }
 
 #include "pickle/pickle.c"