Issue #2396: backport the memoryview object.
diff --git a/Objects/abstract.c b/Objects/abstract.c
index c67581e..e26e057 100644
--- a/Objects/abstract.c
+++ b/Objects/abstract.c
@@ -439,7 +439,7 @@
 }
 
 
-static void
+void
 _add_one_to_index_F(int nd, Py_ssize_t *index, Py_ssize_t *shape)
 {
 	int k;
@@ -455,7 +455,7 @@
 	}
 }
 
-static void
+void
 _add_one_to_index_C(int nd, Py_ssize_t *index, Py_ssize_t *shape)
 {
 	int k;