Fix coffee list rotation

wp-content/themes/mont58-coffee/functions.php

@@ -166,7 +166,7 @@ function action_wcs_renewal_order_created($order, $subscription)
                 $last_order_coffee["coffee"]->ID,
                 $last_order_coffee["coffee_list"]->coffees
             );
-            if (!$position_in_list) {
+            if ($position_in_list === false) {
                 // ignore this, can't find it in list anymore
                 continue;
             }