[Bug 35256] uninitialized DBusError leads to assertion error

[Alessandro Decina]

Public bug reported:
https://launchpad.net/malone/bugs/35256

Affects: gnome-screensaver (Ubuntu)
       Severity: Normal
       Priority: (none set)
         Status: Unconfirmed

Description:
on a ppc machine, when the screen is locked and the brightness level is
changed, gnome-screensaver crashes with the following error:

4653: arguments to dbus_message_get_args() were incorrect, assertion "(error) == NULL || !dbus_error_is_set ((error))" failed in file dbus-message.c line 1373.
This is normally a bug in some application using the D-BUS library.
The program 'gnome-screensaver-dialog' received an X Window System error.