Description of problem:
GUI firewall-config interface crashed while I was trying to add a new service/port.

Version-Release number of selected component:
firewall-config-0.3.3-2.fc19

Additional info:
reporter:       libreport-2.1.5
cmdline:        /usr/bin/python /usr/bin/firewall-config
core_backtrace: 60363ff895931066c15e303f494df3bbb37526fa 0x637 onChangeService /usr/bin/firewall-config -
executable:     /usr/bin/firewall-config
kernel:         3.9.9-301.fc19.x86_64
runlevel:       N 5
uid:            1006

Truncated backtrace:
firewall-config:1591:onChangeService:AttributeError: 'NoneType' object has no attribute 'getPorts'

Traceback (most recent call last):
  File "/usr/bin/firewall-config", line 1591, in onChangeService
    ports = settings.getPorts()
AttributeError: 'NoneType' object has no attribute 'getPorts'

Local variables in innermost frame:
args: (<TreeSelection object at 0x1c76be0 (GtkTreeSelection at 0x1a05370)>,)
service: <firewall.client.FirewallClientConfigService object at 0x1c80c50>
settings: None
active_service: 'mysql'
self: <__main__.FirewallConfig object at 0x187b350>
destination: {}
modules: []
old_handler: <bound method FirewallConfig._exception_handler of <__main__.FirewallConfig object at 0x187b350>>
ports: []