[gtk] fishbowl: Plug a small leak

[Timm Bäder <baedert src gnome org>]

commit 1866aa93e3b077b74baf19f93d2fbb4f80ae951c
Author: Timm Bäder <mail baedert org>
Date:   Sat Jul 13 10:10:17 2019 +0200

    fishbowl: Plug a small leak

 demos/gtk-demo/fishbowl.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/demos/gtk-demo/fishbowl.c b/demos/gtk-demo/fishbowl.c
index 5eaadcde0f..e420dc3748 100644
--- a/demos/gtk-demo/fishbowl.c
+++ b/demos/gtk-demo/fishbowl.c
@@ -306,6 +306,7 @@ do_fishbowl (GtkWidget *do_widget)
                         G_CALLBACK (gtk_widget_destroyed), &window);
 
       gtk_widget_realize (window);
+      g_object_unref (builder);
     }
 
   if (!gtk_widget_get_visible (window))