Remove link with a problem when an item is purged

Author: Walid

inc/object.class.php

@@ -624,6 +624,10 @@ function cleanDBonPurge() {
          $item = new $type();
          $item->deleteByCriteria($parameters);
       }
+
+      $ip = new Item_Problem();
+      $ip->cleanDBonItemDelete(get_called_class(), $this->getID());
+
    }
 
 
@@ -906,4 +910,4 @@ function transfer($new_entity) {
       return true;
    }
 
-}
+}