Fix definition mismatch for type_is_subtype_base_chain.
diff --git a/Objects/typeobject.c b/Objects/typeobject.c
index 40a654b..482a7a5 100644
--- a/Objects/typeobject.c
+++ b/Objects/typeobject.c
@@ -540,7 +540,7 @@
static PyTypeObject *best_base(PyObject *);
static int mro_internal(PyTypeObject *, PyObject **);
-static int type_is_subtype_base_chain(PyTypeObject *, PyTypeObject *);
+Py_LOCAL_INLINE(int) type_is_subtype_base_chain(PyTypeObject *, PyTypeObject *);
static int compatible_for_assignment(PyTypeObject *, PyTypeObject *, char *);
static int add_subclass(PyTypeObject*, PyTypeObject*);
static int add_all_subclasses(PyTypeObject *type, PyObject *bases);