[gdm] session: ignore pam info messages for automatic sessions

[Ray Strode <halfline src gnome org>]

commit 51b03d450875e82db29f905ac7e0fa12bed79304
Author: Ray Strode <rstrode redhat com>
Date:   Fri Oct 5 16:52:14 2012 -0400

    session: ignore pam info messages for automatic sessions
    
    launch-environment sessions and autologin sessions don't have
    a greeter associated with them to ask the user questions, or
    to display PAM messages. It's assumed the PAM stack will be
    set up in such a way that no conversing will be required.
    
    This assumption isn't always correct, if the system pam configuration
    includes something like pam_lastlog.
    
    This commit makes us discard info messages silently rather than
    fail.

 daemon/gdm-session.c |   11 +++++------
 1 files changed, 5 insertions(+), 6 deletions(-)
---
diff --git a/daemon/gdm-session.c b/daemon/gdm-session.c
index f8c520b..332e71b 100644
--- a/daemon/gdm-session.c
+++ b/daemon/gdm-session.c
@@ -713,15 +713,14 @@ gdm_session_handle_info (GdmDBusWorkerManager  *worker_manager_interface,
                          const char            *info,
                          GdmSession            *self)
 {
-
-        g_return_val_if_fail (self->priv->user_verifier_interface != NULL, FALSE);
-
         gdm_dbus_worker_manager_complete_info (worker_manager_interface,
                                                invocation);
 
-        gdm_dbus_user_verifier_emit_info (self->priv->user_verifier_interface,
-                                          service_name,
-                                          info);
+        if (self->priv->user_verifier_interface != NULL) {
+                gdm_dbus_user_verifier_emit_info (self->priv->user_verifier_interface,
+                                                  service_name,
+                                                  info);
+        }
 
         return TRUE;
 }