whatsnew: PyStructSequence_InitType2, Victor's MemoryError fixes.

I'm documenting this new function, but I'm wondering if this will trigger
someone to think about whether or not this actually makes sense :)
diff --git a/Doc/c-api/tuple.rst b/Doc/c-api/tuple.rst
index 184affb..0876739 100644
--- a/Doc/c-api/tuple.rst
+++ b/Doc/c-api/tuple.rst
@@ -129,6 +129,14 @@
    Initializes a struct sequence type *type* from *desc* in place.
 
 
+.. c:function:: void PyStructSequence_InitType2(PyTypeObject *type, PyStructSequence_Desc *desc)
+
+   The same as ``PyStructSequence_InitType``, but returns ``0`` on success and ``-1`` on
+   failure.
+
+   .. versionadded:: 3.4
+
+
 .. c:type:: PyStructSequence_Desc
 
    Contains the meta information of a struct sequence type to create.