FIX image from medias directory into PDF free text

htdocs/admin/chequereceipts.php

htdocs/admin/commande.php

htdocs/admin/contract.php

htdocs/admin/expedition.php

htdocs/admin/expensereport.php

htdocs/admin/facture.php

htdocs/admin/fichinter.php

htdocs/admin/livraison.php

htdocs/admin/propal.php

htdocs/admin/supplier_invoice.php

htdocs/admin/supplier_order.php

htdocs/admin/supplier_proposal.php

htdocs/core/lib/pdf.lib.php