[libpanel] example: remove autoptr usage

[Christian Hergert <chergert src gnome org>]

commit e4581452d567113b9a8dc61ad37bbaabe4916146
Author: Christian Hergert <chergert redhat com>
Date:   Tue Sep 13 16:09:19 2022 -0700

    example: remove autoptr usage

 example/example-page.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/example/example-page.c b/example/example-page.c
index 42d6421..d9c216d 100644
--- a/example/example-page.c
+++ b/example/example-page.c
@@ -176,7 +176,7 @@ example_page_class_init (ExamplePageClass *klass)
 static void
 example_page_init (ExamplePage *self)
 {
-  g_autoptr(PanelSaveDelegate) delegate = NULL;
+  PanelSaveDelegate *delegate = NULL;
   GtkWidget *scroller;
 
   scroller = gtk_scrolled_window_new ();
@@ -238,4 +238,5 @@ example_page_init (ExamplePage *self)
   g_object_bind_property (self, "icon", delegate, "icon", G_BINDING_SYNC_CREATE);
   panel_save_delegate_set_subtitle (delegate, "~/Documents");
   panel_widget_set_save_delegate (PANEL_WIDGET (self), delegate);
+  g_clear_object (&delegate);
 }