title: TCPDF landscape custom page size issue
body: <p>When I try to generate a landscape page with a custom size with TCPDF, the page does not fit to what I asked at all.</p>
  
  <p>Try this :</p>
  
  <pre><code>require('tcpdf.php');
  $pdf = new TCPDF('L', 'mm', array(210,97), true, 'UTF-8', false);
  $pdf-&gt;SetPrintHeader(false);
  $pdf-&gt;SetPrintFooter(false);
  $pdf-&gt;SetFont('helvetica', '', 10);
  $pdf-&gt;AddPage('L', array(210,97));
  $pdf-&gt;Text(0, 72, 'Test');
  $pdf-&gt;Text(0, 73, 'Test');
  $pdf-&gt;Output('test.pdf', 'I');
  </code></pre>
  
  <p>TCPDF add a new page, but it shouldn't. It's the same with images. The page doesn't seem to be 210mm large.</p>
  
  <p>Is it me or a TCPDF bug ? How to solve that ?</p>
  
  <p>Thank you !
  Nils</p>