make [posix,nt].DirEntry immutable

Author: picnixz

Modules/posixmodule.c

@@ -16035,11 +16035,14 @@ static PyType_Slot DirEntryType_slots[] = {
 };
 
 static PyType_Spec DirEntryType_spec = {
-    MODNAME ".DirEntry",
-    sizeof(DirEntry),
-    0,
-    Py_TPFLAGS_DEFAULT | Py_TPFLAGS_DISALLOW_INSTANTIATION,
-    DirEntryType_slots
+    .name = MODNAME ".DirEntry",
+    .basicsize = sizeof(DirEntry),
+    .flags = (
+        Py_TPFLAGS_DEFAULT
+        | Py_TPFLAGS_DISALLOW_INSTANTIATION
+        | Py_TPFLAGS_IMMUTABLETYPE
+    ),
+    .slots = DirEntryType_slots
 };