Update Objects/funcobject.c

Co-authored-by: Victor Stinner <vstinner@python.org>

Author: Aniketsy

Objects/funcobject.c

@@ -1646,8 +1646,9 @@ static PyObject *
 cm_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
 {
     classmethod *cm = (classmethod *)PyType_GenericAlloc(type, 0);
-    if (cm == NULL)
+    if (cm == NULL) {
         return NULL;
+    }
     cm->cm_callable = Py_None;
     cm->cm_dict = NULL;
     return (PyObject *)cm;