[PATCH] fix race condition in protected_change_timeout()

[Havoc Pennington]

See also:
https://bugs.freedesktop.org/show_bug.cgi?id=17754
https://bugs.freedesktop.org/show_bug.cgi?id=857
http://lists.freedesktop.org/pipermail/dbus/2007-December/009085.html
http://lists.freedesktop.org/archives/dbus/2009-March/011035.html
http://lists.freedesktop.org/archives/dbus/2009-March/011105.html

And a more elaborate version of your patch:
http://lists.freedesktop.org/archives/dbus/2008-January/009100.html

I don't know why that more elaborate version hasn't been applied, I
guess we just forgot (and nobody reviewed it)

Anyway thread support needs some work.

Havoc