s-c-p doesn't react on ALREADY_ENABLED firewalld exception

Author: zdohnal

NEWS

@@ -23,3 +23,6 @@
 - Addition of some strings for i18n (https://github.com/zdohnal/system-config-printer/pull/81)
 - Update .po and .pot files
 - added GenericName and X-GNOME-FullName to system-config-printer.desktop.in (https://github.com/zdohnal/system-config-printer/issues/20)
+- removed some deprecated parts of gui
+- updated translations by files from Zanata
+- s-c-p doesn't react on ALREADY_ENABLED exception from firewalld

firewallsettings.py

@@ -118,7 +118,13 @@ def add_service (self, service):
         if not self._get_fw_data ():
             return
 
-        self._fw_data.addService (service)
+        from firewall.errors import FirewallError
+        import firewall.errors
+        try:
+            self._fw_data.addService (service)
+        except FirewallError as e:
+            if e.code is firewall.errors.ALREADY_ENABLED:
+                pass
 
     def check_ipp_client_allowed (self):
         if not self._get_fw_data ():