[gtk/emblem-demo: 1/3] gtk-demo: Fix a few crash

[Matthias Clasen <matthiasc src gnome org>]

commit 2679e29375ef263fc0d84d7f4e63f3fb4689f88a
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Sep 11 21:05:09 2020 -0400

    gtk-demo: Fix a few crash
    
    The paintable demos were forgetting to clear
    their window variable.

 demos/gtk-demo/paintable.c          | 1 +
 demos/gtk-demo/paintable_animated.c | 1 +
 2 files changed, 2 insertions(+)
---
diff --git a/demos/gtk-demo/paintable.c b/demos/gtk-demo/paintable.c
index 982697ed7c..3b3da1e0bc 100644
--- a/demos/gtk-demo/paintable.c
+++ b/demos/gtk-demo/paintable.c
@@ -161,6 +161,7 @@ do_paintable (GtkWidget *do_widget)
                               gtk_widget_get_display (do_widget));
       gtk_window_set_title (GTK_WINDOW (window), "Nuclear Icon");
       gtk_window_set_default_size (GTK_WINDOW (window), 300, 200);
+      g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
 
       nuclear = gtk_nuclear_icon_new (0.0);
       image = gtk_image_new_from_paintable (nuclear);
diff --git a/demos/gtk-demo/paintable_animated.c b/demos/gtk-demo/paintable_animated.c
index f7571c08b2..17b1372d98 100644
--- a/demos/gtk-demo/paintable_animated.c
+++ b/demos/gtk-demo/paintable_animated.c
@@ -193,6 +193,7 @@ do_paintable_animated (GtkWidget *do_widget)
                               gtk_widget_get_display (do_widget));
       gtk_window_set_title (GTK_WINDOW (window), "Nuclear Animation");
       gtk_window_set_default_size (GTK_WINDOW (window), 300, 200);
+      g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
 
       nuclear = gtk_nuclear_animation_new ();
       image = gtk_image_new_from_paintable (nuclear);