[empathy] Don't dereference a NULL error

[Emilio Pozuelo Monfort <epm src gnome org>]

commit be542f50da6bc3e7d24b808aac16b1f542be7dc0
Author: Emilio Pozuelo Monfort <emilio pozuelo collabora co uk>
Date:   Wed Aug 7 19:29:15 2013 +0200

    Don't dereference a NULL error
    
    libsecret returns FALSE without an error in some cases but we
    unconditionally dereference it, causing a crash.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=692105

 libempathy/empathy-keyring.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/libempathy/empathy-keyring.c b/libempathy/empathy-keyring.c
index 4066734..367346b 100644
--- a/libempathy/empathy-keyring.c
+++ b/libempathy/empathy-keyring.c
@@ -656,7 +656,8 @@ items_delete_cb (GObject *source,
   GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (user_data);
   GError *error = NULL;
 
-  if (!secret_password_clear_finish (result, &error))
+  secret_password_clear_finish (result, &error);
+  if (error != NULL)
     {
       g_simple_async_result_set_error (simple, TP_ERROR,
               TP_ERROR_DOES_NOT_EXIST, "%s", error->message);