Address review

Author: sobolevn

Objects/listobject.c

@@ -447,6 +447,7 @@ static int
 ins1(PyListObject *self, Py_ssize_t where, PyObject *v)
 {
     Py_ssize_t i, n = Py_SIZE(self);
+    PyObject **items;
     if (v == NULL) {
         PyErr_BadInternalCall();
         return -1;
@@ -463,9 +464,10 @@ ins1(PyListObject *self, Py_ssize_t where, PyObject *v)
     }
     if (where > n)
         where = n;
+    items = self->ob_item;
     for (i = n; --i >= where; )
-        FT_ATOMIC_STORE_PTR_RELEASE(self->ob_item[i+1], self->ob_item[i]);
-    FT_ATOMIC_STORE_PTR_RELEASE(self->ob_item[where], Py_NewRef(v));
+        FT_ATOMIC_STORE_PTR_RELAXED(items[i+1], items[i]);
+    FT_ATOMIC_STORE_PTR_RELEASE(items[where], Py_NewRef(v));
     return 0;
 }