Fix preversion for cash desk module

htdocs/cashdesk/affContenu.php

htdocs/cashdesk/affIndex.php

htdocs/cashdesk/classes/Auth.class.php

htdocs/cashdesk/classes/Facturation.class.php

htdocs/cashdesk/classes/Mysql.class.php

htdocs/cashdesk/classes/Sql.interface.php

htdocs/cashdesk/facturation.php

htdocs/cashdesk/facturation_dhtml.php

htdocs/cashdesk/facturation_verif.php

htdocs/cashdesk/include/environnement.php

htdocs/cashdesk/index_verif.php

htdocs/cashdesk/liste_articles.php

htdocs/cashdesk/templates/liste_articles.tpl.php

htdocs/cashdesk/templates/ticket.tpl.php

htdocs/cashdesk/validation_verif.php

htdocs/lib/databases/mysqli.lib.php