Fix: fix not initialized variables

htdocs/boutique/commande/class/boutiquecommande.class.php

htdocs/boutique/promotion/class/promotion.class.php

htdocs/categories/class/categorie.class.php

htdocs/core/class/CMailFile.class.php

htdocs/core/class/CSMSFile.class.php

htdocs/core/class/ldap.class.php

htdocs/core/lib/files.lib.php

htdocs/core/lib/functions.lib.php

htdocs/core/lib/functions2.lib.php

htdocs/core/lib/pdf.lib.php

htdocs/core/lib/report.lib.php

htdocs/core/lib/sendings.lib.php