Fixes #43- {IP} placeholder not assigned

Fixed issue with the module not detecting the IP address for the dns
zone and added error check which rolls back changes in the event of an
error.

ispcfg3.php

@@ -467,8 +467,15 @@ function ispcfg3_CreateAccount(array $params ) {
             $svr = $tmpl['web_servers'];
             logModuleCall( 'ispconfig', 'CreatePostDomainAdd', $svr, $ispcparams, '', '');
 
-            $zoneip = $client->server_get( $svr );
-            $tmpip = $zoneip['server']['ip_address'];
+            $zoneip = $client->server_get( $svr, 'server' );
+            $tmpip = $zoneip['response'][1]['ip_address'];
+
+            if ( empty( $tmpip ) ) {
+
+                $client->client_delete_everything( $client_id );
+                return "Webserver IP Address not found.";
+                end;
+            }
 
             logModuleCall('ispconfig','CreatePreDNSZone',$domain,'DNS Template '.$client_id['response']." ".$dnstemplate." ".$domain." ".$tmpip." ".$nameserver1." ".$nameserver2." ".$soaemail,'','');
             $dns_id = $client->dns_templatezone_add( $client_id, $dnstemplate, $domain, $tmpip, $nameserver1, $nameserver2, $soaemail );