[gtk+] stack sidebar: Use an element name

[Matthias Clasen <matthiasc src gnome org>]

commit 099cde5f80e693f30b4b19f3c12936dc89d9afc0
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Nov 3 23:27:34 2015 -0500

    stack sidebar: Use an element name

 gtk/gtkstacksidebar.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkstacksidebar.c b/gtk/gtkstacksidebar.c
index df96f37..ba5a773 100644
--- a/gtk/gtkstacksidebar.c
+++ b/gtk/gtkstacksidebar.c
@@ -44,6 +44,10 @@
  * can use gtk_stack_sidebar_set_stack() to connect the #GtkStackSidebar
  * to the #GtkStack.
  *
+ * # CSS nodes
+ *
+ * GtkStackSidebar has a single CSS node with name stacksidebar.
+ *
  * Since: 3.16
  */
  
@@ -434,6 +438,7 @@ static void
 gtk_stack_sidebar_class_init (GtkStackSidebarClass *klass)
 {
   GObjectClass *object_class = G_OBJECT_CLASS (klass);
+  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 
   object_class->dispose = gtk_stack_sidebar_dispose;
   object_class->finalize = gtk_stack_sidebar_finalize;
@@ -447,6 +452,8 @@ gtk_stack_sidebar_class_init (GtkStackSidebarClass *klass)
                            G_PARAM_READWRITE|G_PARAM_STATIC_STRINGS|G_PARAM_EXPLICIT_NOTIFY);
 
   g_object_class_install_properties (object_class, N_PROPERTIES, obj_properties);
+
+  gtk_widget_class_set_css_name (widget_class, "stacksidebar");
 }
 
 /**