xfce-exec functions spawns zombies

[Jasper Huijsmans]

Jean-François Wauthy schreef:
> Hi,
> 
> I haven't updated libxfcegui4 for a while and i did it this morning and
> since then every program launched by xfce4-session or xfdesktop
> terminated as zombies.

Ok, I believe danny is trying to do something clever with the pid to 
cancel startup notification when the process exits. This apparently 
doesn't work :(

While looking at the code I found nothing obviously wrong, but I did 
find this in the glib API docs:

   "Note further that using g_child_watch_source_new() is not compatible
    with calling waitpid(-1) in the application. Calling waitpid() for
    individual pids will still work fine."

I think this means it can't be used in the library. For instance, the 
panel uses waitpid(-1) to handle external plugins.

	Jasper