encoding error when sending mail

There is an error when using a sender's name from the form to compose the email adress. if the sender has some special chars in it's name the mail can not be send...

when $email_from_name contains e.g. "sha'ra" the mail can not be send....

        $email_from_string = $email_from_name . ' <' . $email_from_address . '>';

should be

        $email_from_string = mime_header_encode($email_from_name) . ' <' . $email_from_address . '>';

sorry, can not make a patch since my version differs in multiple area's

Bert