[gtk+] Plug another memory leak in plugman

[Matthias Clasen <matthiasc src gnome org>]

commit 4a531ec6ab04d7a9ebd3e3e1ea1060f811555173
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Feb 1 11:07:12 2015 -0500

    Plug another memory leak in plugman

 examples/plugman.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/examples/plugman.c b/examples/plugman.c
index 53f502e..3e7e02a 100644
--- a/examples/plugman.c
+++ b/examples/plugman.c
@@ -359,7 +359,7 @@ configure_plugins (GSimpleAction *action,
     {
       g_warning ("%s", error->message);
       g_error_free (error);
-      return;
+      goto out;
     }
 
   dialog = (GtkWidget *)gtk_builder_get_object (builder, "plugin-dialog");
@@ -373,6 +373,9 @@ configure_plugins (GSimpleAction *action,
   g_signal_connect (dialog, "response", G_CALLBACK (gtk_widget_destroy), NULL);
 
   gtk_window_present (GTK_WINDOW (dialog));
+
+out:
+  g_object_unref (builder);
 }
 
 static GActionEntry app_entries[] = {