[empathy] account-widget: check that the apply button actually exist before modifying it

[Guillaume Desmottes <gdesmott src gnome org>]

commit 48a4f5ec33f06f0e26017fcf7fc4c235a8e6d7df
Author: Guillaume Desmottes <guillaume desmottes collabora co uk>
Date:   Tue Jan 19 13:42:12 2010 +0000

    account-widget: check that the apply button actually exist before modifying it
    
    It's not created in the 'simple' version of the widget. (#607455)

 libempathy-gtk/empathy-account-widget.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/libempathy-gtk/empathy-account-widget.c b/libempathy-gtk/empathy-account-widget.c
index 52efbce..112673d 100644
--- a/libempathy-gtk/empathy-account-widget.c
+++ b/libempathy-gtk/empathy-account-widget.c
@@ -1311,6 +1311,10 @@ presence_changed_cb (TpAccountManager *manager,
   if (priv->destroyed)
     return;
 
+  if (priv->apply_button == NULL)
+    /* This button doesn't exist in 'simple' mode */
+    return;
+
   if (state > TP_CONNECTION_PRESENCE_TYPE_OFFLINE)
     {
       /* We are online, display a Login button */