[gnome-builder] workbench: use autoptr

[Christian Hergert <chergert src gnome org>]

commit ce4e351664310172f4159feb1d45e77cb0f250f2
Author: Christian Hergert <chergert redhat com>
Date:   Wed Jan 4 18:45:14 2017 -0800

    workbench: use autoptr

 libide/workbench/ide-workbench.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)
---
diff --git a/libide/workbench/ide-workbench.c b/libide/workbench/ide-workbench.c
index f6e1303..b22379f 100644
--- a/libide/workbench/ide-workbench.c
+++ b/libide/workbench/ide-workbench.c
@@ -416,7 +416,7 @@ ide_workbench_class_init (IdeWorkbenchClass *klass)
 static void
 ide_workbench_init (IdeWorkbench *self)
 {
-  GtkWindowGroup *window_group = NULL;
+  g_autoptr(GtkWindowGroup) window_group = NULL;
 
   gtk_widget_init_template (GTK_WIDGET (self));
 
@@ -432,7 +432,6 @@ ide_workbench_init (IdeWorkbench *self)
 
   window_group = gtk_window_group_new ();
   gtk_window_group_add_window (window_group, GTK_WINDOW (self));
-  g_object_unref (window_group);
 }
 
 static void