updated for version 7.3.947

Problem:    Python: No iterator for vim.list and vim.bufferlist.
Solution:   Add the iterators. Also fix name of FunctionType. Add tests for
            vim.buffers.  (ZyX)

src/if_python.c

@@ -1219,6 +1219,7 @@ PythonMod_Init(void)
     static char *(argv[2]) = {"/must>not&exist/foo", NULL};
 
     /* Fixups... */
+    PyType_Ready(&IterType);
     PyType_Ready(&BufferType);
     PyType_Ready(&RangeType);
     PyType_Ready(&WindowType);