Fix fatal error when date.timezone isn't set (#1488546)

CHANGELOG

@@ -1,6 +1,7 @@
 CHANGELOG Roundcube Webmail
 ===========================
 
+- Fix fatal error when date.timezone isn't set (#1488546)
 - Update to TinyMCE 3.5.4.1
 - Better icons with distinct shapes for priority columns (#1488377)
 - Show dedicated icon for multipart/report messages (#1488524)

program/steps/settings/func.inc

@@ -181,7 +181,6 @@ function rcmail_user_prefs($current=null)
       $select_timezone = new html_select(array('name' => '_timezone', 'id' => $field_id));
       $select_timezone->add(rcube_label('autodetect'), 'auto');
 
-      $now = new DateTime();
       foreach (DateTimeZone::listIdentifiers() as $i => $tzs) {
         try {
           $tz = new DateTimeZone($tzs);