Merge lp:~mterry/lightdm/pam-tty into lp:lightdm

[Michael Terry]

Sets PAM_TTY so that when pam wants to prompt for things like changing passwords it can.

=== modified file 'src/greeter.c'
--- src/greeter.c	2011-11-29 04:42:03 +0000
+++ src/greeter.c	2012-01-04 04:39:25 +0000
@@ -306,6 +306,10 @@
 
     g_signal_connect (G_OBJECT (greeter->priv->authentication), "got-messages", G_CALLBACK (pam_messages_cb), greeter);
     g_signal_connect (G_OBJECT (greeter->priv->authentication), "authentication-result", G_CALLBACK (authentication_result_cb), greeter);
+
+    pam_session_set_item (greeter->priv->authentication, PAM_TTY,
+                          session_get_env (greeter->priv->session, "DISPLAY"));
+
     result = pam_session_authenticate (greeter->priv->authentication, &error);
     if (error)
         g_debug ("Failed to start authentication: %s", error->message);