- Don't call rcube_idn_to_ascii() on empty data

program/steps/settings/save_identity.inc

@@ -116,9 +116,12 @@ else if (IDENTITIES_LEVEL < 2)
   $plugin = $RCMAIL->plugins->exec_hook('identity_create', array('record' => $save_data));
   $save_data = $plugin['record'];
 
-  $save_data['email']    = rcube_idn_to_ascii($save_data['email']);
-  $save_data['bcc']      = rcube_idn_to_ascii($save_data['bcc']);
-  $save_data['reply-to'] = rcube_idn_to_ascii($save_data['reply-to']);
+  if ($save_data['email'])
+    $save_data['email']    = rcube_idn_to_ascii($save_data['email']);
+  if ($save_data['bcc'])
+    $save_data['bcc']      = rcube_idn_to_ascii($save_data['bcc']);
+  if ($save_data['reply-to'])
+    $save_data['reply-to'] = rcube_idn_to_ascii($save_data['reply-to']);
 
   if (!$plugin['abort'])
     $insert_id = $save_data['email'] ? $USER->insert_identity($save_data) : null;