Description of problem:
Tried to "Reload the FirewallD service" after applying the changes in https rules.

Version-Release number of selected component:
firewall-config-0.3.11-3.fc21

Additional info:
reporter:       libreport-2.3.0
cmdline:        /usr/bin/python -Es /usr/bin/firewall-config
executable:     /usr/bin/firewall-config
kernel:         3.17.0-301.fc21.x86_64
runlevel:       N 5
type:           Python
uid:            1000

Truncated backtrace:
firewall-config:2027:onChangeZone:TypeError: Argument 1 does not allow None as a value

Traceback (most recent call last):
  File "/usr/bin/firewall-config", line 2027, in onChangeZone
    self.masqueradeCheck.set_active(masquerade)
TypeError: Argument 1 does not allow None as a value

Local variables in innermost frame:
masquerade: None
name: 'xmpp-server'
_services: []
sources: []
default: False
interfaces: ['em1', 'virbr0']
args: (<TreeSelection object at 0x7fcee6033690 (GtkTreeSelection at 0x2c358d0)>,)
iter: None
self: <__main__.FirewallConfig object at 0x7fcee790be50>
item: ['1025-65535', 'tcp']
builtin: False
icmpblocks: []
rules: []
services: ['dhcpv6-client', 'samba-client', 'ssh']
selected_zone: 'FedoraWorkstation'
ports: [['1025-65535', 'udp'], ['1025-65535', 'tcp']]
forward_ports: []