Fix: change the last $DB to $db

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

htdocs/commande/class/commande.class.php

htdocs/core/modules/mailings/example.modules.php

htdocs/document.php

htdocs/exports/export.php

htdocs/install/lib/repair.lib.php

htdocs/product/canvas/product/actions_card_product.class.php

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

htdocs/societe/canvas/company/actions_card_company.class.php

...ciete/canvas/individual/actions_card_individual.class.php