bpo-37483: add _PyObject_CallOneArg() function (#14558)

diff --git a/Modules/_sre.c b/Modules/_sre.c
index d4fe588..f4f9d01 100644
--- a/Modules/_sre.c
+++ b/Modules/_sre.c
@@ -1082,7 +1082,7 @@
             match = pattern_new_match(self, &state, 1);
             if (!match)
                 goto error;
-            item = PyObject_CallFunctionObjArgs(filter, match, NULL);
+            item = _PyObject_CallOneArg(filter, match);
             Py_DECREF(match);
             if (!item)
                 goto error;