Use a new macro, PySequence_Fast_ITEMS to factor out code common to
three recent optimizations.  Aside from reducing code volume, it
increases readability.
diff --git a/Include/abstract.h b/Include/abstract.h
index 46aee29..bc9df05 100644
--- a/Include/abstract.h
+++ b/Include/abstract.h
@@ -1016,6 +1016,12 @@
 	  need to be corrected for a negative index
        */     
 
+#define _PySequence_Fast_ITEMS(sf) \
+	(PyList_Check(sf) ? ((PyListObject *)(sf))->ob_item \
+			  : ((PyTupleObject *)(sf))->ob_item)
+	/* Return a pointer to the underlying item array for
+           an object retured by PySequence_Fast */
+
      PyAPI_FUNC(int) PySequence_Count(PyObject *o, PyObject *value);
 
        /*