Parse error: syntax error, unexpected ';' in C:\wamp\www\nmr\sites\all\modules\htmlmail\htmlmail.mail.inc on line 33

you miss a lot of parenthesis!
herebelow i guessed what could be a solution, please review it and commit a new revision

(file htmlmail.mail.inc)

<?php
$eol = variable_get('mail_line_endings', MAIL_LINE_ENDINGS);
    // @todo Remove this when issue #209672 gets resolved.
    $default_from = variable_get('site_mail', ini_get('sendmail_from'));
    if ( !empty($message['headers']['From'])
      && ($message['headers']['From'] == $default_from)
      && valid_email_address($default_from)
    ) {
      $message['headers']['From'] = '"'
      . str_replace('"', '', variable_get('site_name', 'Drupal'))
        . '" <' . $default_from . '>';
    }
?>