Missing PDF_PRODUCER

In TCPDF changelog we can read:
5.9.012 (2010-11-12)
- PDF_PRODUCER constant was removed.

But print module continue to use this in: print_pdf.pages.inc at line:

if (strpos(PDF_PRODUCER, 'PHP4') === FALSE) {

and

sscanf(PDF_PRODUCER, "TCPDF %d.%d.%d", $major, $minor, $build);

So we have some Notice. Please fix this.