[gnome-settings-daemon] power: Fix a critical warning when getting the session inhibit state

[Richard Hughes <rhughes src gnome org>]

commit b4a84fc4b2219398ae6736401fe1d2358688e186
Author: Richard Hughes <richard hughsie com>
Date:   Tue Sep 13 14:53:59 2011 +0100

    power: Fix a critical warning when getting the session inhibit state

 plugins/power/gsd-power-manager.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/plugins/power/gsd-power-manager.c b/plugins/power/gsd-power-manager.c
index d211a50..1192be7 100644
--- a/plugins/power/gsd-power-manager.c
+++ b/plugins/power/gsd-power-manager.c
@@ -2776,7 +2776,7 @@ idle_is_session_inhibited (GsdPowerManager *manager, guint mask)
                 return FALSE;
         }
 
-        ret = g_variant_get_boolean (retval);
+        g_variant_get (retval, "(b)", &ret);
         g_variant_unref (retval);
 
         return ret;