Description of problem:
Attempting to run firewall-cmd --status or to add rules results in a stack trace


Version-Release number of selected component (if applicable):
firewalld.noarch, 0.1.3-2.fc15, @fedora

How reproducible:
Fails consistently

Steps to Reproduce:
1.systemctl enable firewalld.service
2.firewall-cmd --status
  
Actual results:

[mk@bender ~]$ sudo firewall-cmd --status
Traceback (most recent call last):
  File "/usr/bin/firewall-cmd", line 147, in <module>
    status = fw.status()
  File "<string>", line 2, in status
  File "/usr/lib/python2.7/site-packages/slip/dbus/polkit.py", line 141, in _enable_proxy
    return func(*p, **k)
  File "/usr/share/firewalld/firewall_client.py", line 61, in status
    return self.fw.status()
  File "/usr/lib/python2.7/site-packages/dbus/proxies.py", line 68, in __call__
    return self._proxy_method(*args, **keywords)
  File "/usr/lib/python2.7/site-packages/slip/dbus/proxies.py", line 41, in __call__
    return dbus.proxies._ProxyMethod.__call__(self, *args, **kwargs)
  File "/usr/lib/python2.7/site-packages/dbus/proxies.py", line 140, in __call__
    **keywords)
  File "/usr/lib/python2.7/site-packages/dbus/connection.py", line 630, in call_blocking
    message, timeout)
TypeError: a float is required

Expected results:
Some output indicating that the firewall is running (as per `systemctl status firewalld.service`), ala:
[mk@bender ~]$ systemctl status firewalld.service
firewalld.service - LSB: The firewall deamon manages the firewall and handles dynamic
	  Loaded: loaded (/etc/rc.d/init.d/firewalld)
	  Active: active (running) since Mon, 27 Jun 2011 16:43:49 -0400; 15h ago
	Main PID: 1062 (firewalld)
	  CGroup: name=systemd:/system/firewalld.service
		  └ 1062 /usr/bin/python /usr/sbin/firewalld


Additional info: