FIX private property can't be read when building pdf

htdocs/core/lib/pdf.lib.php

@@ -319,14 +319,16 @@ function pdfGetHeightForHtmlContent(&$pdf, $htmlcontent)
     {
         for ($page=$start_page; $page <= $end_page; ++$page) {
         	$pdf->setPage($page);
+        	$tmpm=$pdf->getMargins();
+        	$tMargin = $tmpm['top'];
         	if ($page == $start_page) {
         		// first page
-        		$height = $pdf->h - $start_y - $pdf->bMargin;
+        		$height = $pdf->getPageHeight() - $start_y - $pdf->getBreakMargin();
         	} elseif ($page == $end_page) {
         		// last page
-        		$height = $end_y - $pdf->tMargin;
+        		$height = $end_y - $tMargin;
         	} else {
-        		$height = $pdf->h - $pdf->tMargin - $pdf->bMargin;
+        		$height = $pdf->getPageHeight() - $tMargin - $pdf->getBreakMargin();
         	}
         }
 	}
@@ -949,7 +951,7 @@ function pdf_pagefoot(&$pdf,$outputlangs,$paramfreetext,$fromcompany,$marge_bass
 	if ($line)	// Free text
 	{
 		//$line="eee<br>\nfd<strong>sf</strong>sdf<br>\nghfghg<br>";
-	    if (empty($conf->global->PDF_ALLOW_HTML_FOR_FREE_TEXT))   // by default
+	    if (empty($conf->global->PDF_ALLOW_HTML_FOR_FREE_TEXT))
 		{
 			$width=20000; $align='L';	// By default, ask a manual break: We use a large value 20000, to not have automatic wrap. This make user understand, he need to add CR on its text.
     		if (! empty($conf->global->MAIN_USE_AUTOWRAP_ON_FREETEXT)) {