[gnome-control-center] power: Don't print a message to .xsession-errors if it's not an error

[Richard Hughes <rhughes src gnome org>]

commit d9222bd5b52ed80cb6fb02fe729cae30604b3bc1
Author: Richard Hughes <richard hughsie com>
Date:   Thu Sep 1 14:11:55 2011 +0100

    power: Don't print a message to .xsession-errors if it's not an error

 panels/power/cc-power-panel.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/panels/power/cc-power-panel.c b/panels/power/cc-power-panel.c
index 6ff3e4c..e7d3efb 100644
--- a/panels/power/cc-power-panel.c
+++ b/panels/power/cc-power-panel.c
@@ -214,7 +214,8 @@ get_primary_device_cb (GObject *source_object, GAsyncResult *res, gpointer user_
   result = g_dbus_proxy_call_finish (G_DBUS_PROXY (source_object), res, &error);
   if (result == NULL)
     {
-      g_printerr ("Error getting primary device: %s\n", error->message);
+      if (g_strstr_len (error->message, -1, "no primary device") == NULL)
+        g_printerr ("Error getting primary device: %s\n", error->message);
       g_error_free (error);
       gtk_widget_hide (status_box);
       return;