Use internal strtolower function because mbstring is optional

thomascube

2008-06-05 70aa900cba768a99347d41a9af57edb52ec77577

 program/include/rcube_imap.php

@@ -2502,7 +2502,7 @@
      if (($p = array_search(strtolower($folder), $this->default_folders_lc)) !== false && !$a_defaults[$p])
        $a_defaults[$p] = $folder;
      else
   $folders[$folder] = mb_strtolower(rcube_charset_convert($folder, 'UTF-7'));
        $folders[$folder] = rc_strtolower(rcube_charset_convert($folder, 'UTF-7'));
      }

    asort($folders, SORT_LOCALE_STRING);