[empathy] actually display the 'go online' button

[Guillaume Desmottes <gdesmott src gnome org>]

commit 96020e16337fe47fe35d88db9fb2503bc213b86e
Author: Guillaume Desmottes <guillaume desmottes collabora co uk>
Date:   Thu Sep 6 15:41:47 2012 +0200

    actually display the 'go online' button
    
    I added this flag exactly for this and then forgot to use it...

 src/empathy-roster-window.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/empathy-roster-window.c b/src/empathy-roster-window.c
index 4df1ee4..cea6ac5 100644
--- a/src/empathy-roster-window.c
+++ b/src/empathy-roster-window.c
@@ -1622,7 +1622,7 @@ set_notebook_page (EmpathyRosterWindow *self)
     {
       display_page_message (self,
           _("Change your presence to see contacts here"),
-          PAGE_MESSAGE_FLAG_NONE);
+          PAGE_MESSAGE_FLAG_ONLINE);
       goto out;
     }