Check mime headers before attempt to parse them (#1487745); broken since r4421

thomascube

2011-01-29 d755eade08a562c34669280f855f7f0178081f61

 program/include/rcube_imap.php

@@ -2238,7 +2238,11 @@
                $mime_headers = $this->conn->fetchPartHeader(
                    $this->mailbox, $this->_msg_id, false, $struct->mime_id);
            }
            $struct->headers = $this->_parse_headers($mime_headers) + $struct->headers;

            if (is_string($mime_headers))
                $struct->headers = $this->_parse_headers($mime_headers) + $struct->headers;
            else if (is_object($mime_headers))
                $struct->headers = get_object_vars($mime_headers) + $struct->headers;

            // get real content-type of message/rfc822
            if ($struct->mimetype == 'message/rfc822') {