[gtk/fix-fishbowl] gtk-demo: Fix fishbowl setup

[Matthias Clasen <matthiasc src gnome org>]

commit 220ccaf363e48a1dc30861da6501090ad020fea1
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Feb 11 08:24:06 2019 -0500

    gtk-demo: Fix fishbowl setup
    
    The fishbowl demo was failing to reset a static variable
    when setting up, causing it to crash the second time around.
    
    Closes: #1665

 demos/gtk-demo/fishbowl.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
---
diff --git a/demos/gtk-demo/fishbowl.c b/demos/gtk-demo/fishbowl.c
index af5a3ae8f9..0f926c8fd1 100644
--- a/demos/gtk-demo/fishbowl.c
+++ b/demos/gtk-demo/fishbowl.c
@@ -264,7 +264,10 @@ do_fishbowl (GtkWidget *do_widget)
                                         NULL);
       gtk_builder_connect_signals (builder, NULL);
       window = GTK_WIDGET (gtk_builder_get_object (builder, "window"));
+      g_signal_connect (window, "destroy",
+                        G_CALLBACK (gtk_widget_destroyed), &window);
       bowl = GTK_WIDGET (gtk_builder_get_object (builder, "bowl"));
+      selected_widget_type = -1;
       set_widget_type (GTK_FISHBOWL (bowl), 0);
       gtk_window_set_display (GTK_WINDOW (window),
                               gtk_widget_get_display (do_widget));
@@ -279,6 +282,5 @@ do_fishbowl (GtkWidget *do_widget)
   else
     gtk_widget_destroy (window);
 
-
   return window;
 }