[empathy] GtkNotebookPage no longer exists in GTK+ 3

[Danielle Madeley <daniellem src gnome org>]

commit 69ff2159a6ed984c212cf2054931e5ae1ee742ff
Author: Danielle Madeley <danielle madeley collabora co uk>
Date:   Thu Jul 15 17:34:20 2010 +1000

    GtkNotebookPage no longer exists in GTK+ 3

 src/empathy-chat-window.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/src/empathy-chat-window.c b/src/empathy-chat-window.c
index a80d3fe..c4ce8b2 100644
--- a/src/empathy-chat-window.c
+++ b/src/empathy-chat-window.c
@@ -1461,7 +1461,7 @@ chat_window_detach_hook (GtkNotebook *source,
 
 static void
 chat_window_page_switched_cb (GtkNotebook      *notebook,
-			      GtkNotebookPage  *page,
+			      gpointer          ignore, /* see note below */
 			      gint	        page_num,
 			      EmpathyChatWindow *window)
 {
@@ -1473,6 +1473,9 @@ chat_window_page_switched_cb (GtkNotebook      *notebook,
 
 	priv = GET_PRIV (window);
 
+	/* N.B. in GTK+ 3 child is passed as the first argument to the signal,
+	 * but we can't use that while trying to retain GTK+ 2.x compatibility.
+	 */
 	child = gtk_notebook_get_nth_page (notebook, page_num);
 	chat = EMPATHY_CHAT (child);