Refactor 'typeobject.c'.

Author: fangerer

graalpython/com.oracle.graal.python.cext/src/typeobject.c

@@ -51,5 +51,5 @@ PyTypeObject PyBaseObject_Type = PY_TRUFFLE_TYPE("object", &PyType_Type, Py_TPFL
 PyTypeObject PySuper_Type = PY_TRUFFLE_TYPE("super", &PyType_Type, Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | Py_TPFLAGS_BASETYPE, sizeof(superobject));
 
 int PyType_IsSubtype(PyTypeObject* a, PyTypeObject* b) {
-    return polyglot_as_i32(polyglot_invoke(PY_TRUFFLE_CEXT, "PyType_IsSubtype", to_java((PyObject*)a), to_java((PyObject*)b)));
+    return UPCALL_CEXT_I("PyType_IsSubtype", native_to_java((PyObject*)a), native_to_java((PyObject*)b));
 }