ItemList/ExtendedCost

* restore internal list pointer after using iterator get extended costs

includes/types/item.class.php

@@ -88,6 +88,8 @@ class ItemList extends BaseType
         if ($this->error)
             return [];
 
+        $idx = $this->id;
+
         if (empty($this->vendors))
         {
             $itemz      = [];
@@ -257,6 +259,9 @@ class ItemList extends BaseType
                 unset($result[$itemId]);
         }
 
+        // restore internal index;
+        $this->getEntry($idx);
+
         return $result;
     }