Added missing for PySequence_List.

Include/abstract.h

@@ -725,6 +725,11 @@ xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx*/
 	 This is equivalent to the Python expression: tuple(o)
        */
 
+     PyObject *PySequence_List Py_PROTO((PyObject *o));
+       /*
+       Returns the o as a list on success, and NULL on failure.
+       This is equivalent to the Python expression: list(o)
+       */
      int PySequence_Count Py_PROTO((PyObject *o, PyObject *value));
 
        /*