Fix displaying all headers when they contain malformed characters (#1488666)

Aleksander Machniak

2012-09-03 4b484710ee367150989cd1b939a04111b8b5a923

 program/steps/mail/headers.inc

@@ -26,7 +26,8 @@
    $source = $RCMAIL->storage->get_raw_headers($uid);

    if ($source !== false) {
        $source = htmlspecialchars(trim($source));
        $source = trim(rcube_charset::clean($source));
        $source = htmlspecialchars($source);
        $source = preg_replace(
            array(
                '/\n[\t\s]+/',