[glib] gtask: fix leak in example code

[Dan Winship <danw src gnome org>]

commit f8d42cefbddf4930e40d6866e7002e556186763e
Author: Dan Winship <danw gnome org>
Date:   Wed Jul 9 10:36:57 2014 -0400

    gtask: fix leak in example code

 gio/gtask.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gio/gtask.c b/gio/gtask.c
index 30d36ae..ad6e50f 100644
--- a/gio/gtask.c
+++ b/gio/gtask.c
@@ -346,6 +346,7 @@
  *       task = g_task_new (self, cancellable, callback, user_data);
  *       g_task_set_task_data (task, cake_data, (GDestroyNotify) cake_data_free);
  *       g_task_run_in_thread (task, bake_cake_thread);
+ *       g_object_unref (task);
  *     }
  *
  *     Cake *