Request for gnome-session freeze break

[Federico Mena Quintero <federico ximian com>]

Just to make sure no fun is missed, I'd like to request permission to
commit an obvious fix to gnome-session.  Please see this bug:

http://bugzilla.gnome.org/show_bug.cgi?id=151664

The patch attached to it should make the bug really obvious.  Whenever
gnome-session adds a client, it installs a timeout handler to purge the
client if it doesn't register itself before the timeout expires.
However, this timeout handler is never removed.  Thus, if the client
gets reincarnated while the timer is running, the old client structure
will be free()d and the timeout handler will access freed memory.

  Federico