Error tcpdf.php on line 1325

It's look like this problem only on PHP 4. I try PHP 5 on my localhost and everything is fine.
But I still need to solve this problem since my hosting is PHP 4.

After upgrade to tcpdf_1_53_0_TC030 that contain bug fix for PHP 4 then above error fixed!

Also, I attach my edited version:
1. including reduced version of tcpdf from 6.5 MB to 400 KB only
2. including tcpdf config that using Drupal variable, mean you don't need to edit K_PATH_MAIN and K_URL_MAIN anymore

The code for #2 is:
$path = drupal_get_path('module', 'pdfview') .'/tcpdf';
define ("K_PATH_MAIN", realpath($path) .'/');

$path = drupal_get_path('module', 'pdfview') .'/tcpdf';
define ("K_PATH_MAIN", realpath($path) .'/');

Regards.