[gnome-session] gnome-session-quit: Fix extra unref when power off is cancelled

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 99ff5bb6685f344fae92696602e8663aca9755b6
Author: Michael Catanzaro <mcatanzaro igalia com>
Date:   Sun Dec 27 14:23:09 2015 -0600

    gnome-session-quit: Fix extra unref when power off is cancelled
    
    GLib-CRITICAL **: g_variant_unref: assertion 'value != NULL' failed
    
    The logout code already accounted for this, but it was missed for power
    off.

 tools/gnome-session-quit.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/tools/gnome-session-quit.c b/tools/gnome-session-quit.c
index 2873ccc..3901d75 100644
--- a/tools/gnome-session-quit.c
+++ b/tools/gnome-session-quit.c
@@ -157,9 +157,9 @@ do_power_off (const char *action)
                 g_warning ("Failed to call %s: %s",
                            action, error->message);
                 g_error_free (error);
+        } else {
+                g_variant_unref (reply);
         }
-
-        g_variant_unref (reply);
         g_clear_object (&sm_proxy);
 }