make _tkinter.tkapp immutable

Author: picnixz

Modules/_tkinter.c

@@ -3326,11 +3326,14 @@ static PyType_Slot Tkapp_Type_slots[] = {
 
 
 static PyType_Spec Tkapp_Type_spec = {
-    "_tkinter.tkapp",
-    sizeof(TkappObject),
-    0,
-    Py_TPFLAGS_DEFAULT | Py_TPFLAGS_DISALLOW_INSTANTIATION,
-    Tkapp_Type_slots,
+    .name = "_tkinter.tkapp",
+    .basicsize = sizeof(TkappObject),
+    .flags = (
+        Py_TPFLAGS_DEFAULT
+        | Py_TPFLAGS_DISALLOW_INSTANTIATION
+        | Py_TPFLAGS_IMMUTABLETYPE
+    ),
+    .slots = Tkapp_Type_slots,
 };
 
 static PyMethodDef moduleMethods[] =