[gnome-settings-daemon] power: Don't crash if we try to calculate the idle state before connected to gnome-session

[Richard Hughes <rhughes src gnome org>]

commit a0c62ab873bff5339e0f239550e24bd5161eb981
Author: Richard Hughes <richard hughsie com>
Date:   Thu Sep 8 11:44:22 2011 +0100

    power: Don't crash if we try to calculate the idle state before connected to gnome-session
    
    Resolves https://bugzilla.gnome.org/show_bug.cgi?id=657917

 plugins/power/gsd-power-manager.c |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)
---
diff --git a/plugins/power/gsd-power-manager.c b/plugins/power/gsd-power-manager.c
index 6c0174a..9706356 100644
--- a/plugins/power/gsd-power-manager.c
+++ b/plugins/power/gsd-power-manager.c
@@ -2730,6 +2730,12 @@ idle_is_session_idle (GsdPowerManager *manager)
         GVariant *result;
         guint status;
 
+        /* not yet connected to gnome-session */
+        if (manager->priv->session_presence_proxy == NULL) {
+                g_warning ("gnome-session is not available");
+                return FALSE;
+        }
+
         /* get the session status */
         result = g_dbus_proxy_get_cached_property (manager->priv->session_presence_proxy,
                                                    "status");
@@ -2750,6 +2756,12 @@ idle_is_session_inhibited (GsdPowerManager *manager, guint mask)
         GVariant *retval = NULL;
         GError *error = NULL;
 
+        /* not yet connected to gnome-session */
+        if (manager->priv->session_proxy == NULL) {
+                g_warning ("gnome-session is not available");
+                return FALSE;
+        }
+
         retval = g_dbus_proxy_call_sync (manager->priv->session_proxy,
                                          "IsInhibited",
                                          g_variant_new ("(u)",