[gtk+] listbox: Fix css node ordering

[Matthias Clasen <matthiasc src gnome org>]

commit 28042ef3363f8ad069190c355503801b20742217
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Apr 11 07:52:39 2016 -0400

    listbox: Fix css node ordering
    
    When inserting a child at the top, we were not inserting its
    css node properly.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=764710

 gtk/gtklistbox.c |   15 ++++++++-------
 1 files changed, 8 insertions(+), 7 deletions(-)
---
diff --git a/gtk/gtklistbox.c b/gtk/gtklistbox.c
index c3aa6a9..2ffa768 100644
--- a/gtk/gtklistbox.c
+++ b/gtk/gtklistbox.c
@@ -2814,17 +2814,18 @@ gtk_list_box_insert_css_node (GtkListBox    *box,
                               GSequenceIter *iter)
 {
   GSequenceIter *prev_iter;
-  GtkWidget *sibling;
+  GtkCssNode *sibling;
 
   prev_iter = g_sequence_iter_prev (iter);
 
   if (prev_iter != iter)
-    {
-      sibling = g_sequence_get (prev_iter);
-      gtk_css_node_insert_after (gtk_widget_get_css_node (GTK_WIDGET (box)),
-                                 gtk_widget_get_css_node (child),
-                                 gtk_widget_get_css_node (sibling));
-    }
+    sibling = gtk_widget_get_css_node (g_sequence_get (prev_iter));
+  else
+    sibling = NULL;
+
+  gtk_css_node_insert_after (gtk_widget_get_css_node (GTK_WIDGET (box)),
+                             gtk_widget_get_css_node (child),
+                             sibling);
 }
 
 /**