Fix: strict mode way

htdocs/contact/canvas/actions_contactcard_common.class.php

...tact/canvas/default/actions_contactcard_default.class.php

htdocs/contact/canvas/default/tpl/contactcard_edit.tpl.php

htdocs/contact/canvas/default/tpl/contactcard_view.tpl.php

htdocs/contact/fiche.php

htdocs/contact/list.php

htdocs/contact/perso.php

htdocs/core/class/commonobject.class.php

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

htdocs/core/lib/ajax.lib.php

htdocs/core/lib/company.lib.php

htdocs/core/lib/contact.lib.php

htdocs/core/lib/functions.lib.php