[gnome-settings-daemon] power: Fix GLib.file_get_contents() usage in test

[Bastien Nocera <hadess src gnome org>]

commit e477570e2130e022d25b97fc48df912e6a92b69b
Author: Bastien Nocera <hadess hadess net>
Date:   Wed Apr 17 16:11:50 2013 +0200

    power: Fix GLib.file_get_contents() usage in test

 plugins/power/test.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/plugins/power/test.py b/plugins/power/test.py
index 602b272..bab0fdb 100755
--- a/plugins/power/test.py
+++ b/plugins/power/test.py
@@ -169,7 +169,7 @@ class PowerPluginTest(gsdtestcase.GSDTestCase):
         return self.obj_session_presence_props.Get('org.gnome.SessionManager.Presence', 'status')
 
     def get_brightness(self):
-        (success, ret, length) = GLib.file_get_contents ('GSD_MOCK_brightness')
+        (success, ret) = GLib.file_get_contents ('GSD_MOCK_brightness')
         return int(ret)
 
     def set_has_external_monitor(self, external):