Issue #18594: Fix the fast path for collections.Counter().
The path wasn't being taken due to an over-restrictive type check.
diff --git a/Include/object.h b/Include/object.h
index 387cadb..20c4780 100644
--- a/Include/object.h
+++ b/Include/object.h
@@ -482,6 +482,7 @@
PyObject *, PyObject *);
#ifndef Py_LIMITED_API
PyAPI_FUNC(PyObject *) _PyType_Lookup(PyTypeObject *, PyObject *);
+PyAPI_FUNC(PyObject *) _PyType_LookupId(PyTypeObject *, _Py_Identifier *);
PyAPI_FUNC(PyObject *) _PyObject_LookupSpecial(PyObject *, _Py_Identifier *);
PyAPI_FUNC(PyTypeObject *) _PyType_CalculateMetaclass(PyTypeObject *, PyObject *);
#endif