Fix a bug in port create

* Fix a bug in port create, that prevented the creation of a port

kamaki/cli/commands/network.py

@@ -456,9 +456,9 @@ class port_create(_init_network, _optional_json):
     @errors.cyclades.connection
     @errors.cyclades.network_id
     def _run(self, network_id, device_id):
-        if not (bool(self['subnet_id']) ^ bool(self['ip_address'])):
+        if bool(self['subnet_id']) ^ bool(self['ip_address']):
             raise CLIInvalidArgument('Invalid use of arguments', details=[
-                '--subned-id and --ip-address should be used together'])
+                '--subnet-id and --ip-address should be used together'])
         fixed_ips = dict(
             subnet_id=self['subnet_id'], ip_address=self['ip_address']) if (
                 self['subnet_id']) else None