Qual: Removed tons of warning

htdocs/adherents/class/adherent.class.php

htdocs/comm/propal/class/propal.class.php

htdocs/commande/class/commande.class.php

htdocs/compta/facture/class/facture.class.php

htdocs/compta/prelevement/class/bon-prelevement.class.php

htdocs/core/class/commonobject.class.php

htdocs/core/class/html.form.class.php

htdocs/core/lib/company.lib.php

htdocs/core/lib/pdf.lib.php

htdocs/core/lib/usergroups.lib.php

htdocs/core/menus/standard/empty.php

.../core/modules/supplier_order/pdf/pdf_muscadet.modules.php

htdocs/ftp/pre.inc.php

htdocs/product/canvas/service/actions_card_service.class.php

htdocs/societe/class/societe.class.php