Several fixes on multicurrency

htdocs/comm/propal/card.php

htdocs/commande/card.php

htdocs/compta/facture.php

htdocs/core/modules/propale/doc/pdf_azur.modules.php

...core/modules/supplier_invoice/pdf/pdf_canelle.modules.php

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

...core/modules/supplier_proposal/doc/pdf_aurore.modules.php

htdocs/fourn/class/fournisseur.commande.class.php

htdocs/fourn/commande/card.php

htdocs/fourn/facture/card.php

htdocs/supplier_proposal/card.php