unsafe type handling in uc_order_condition_count_products

I got Notice messages like:

  Notice: Undefined index: 20 in uc_order_condition_count_products() (Zeile 344 von /home/www/web254/html/klb/sites/all/modules/ubercart/uc_order/uc_order.rules.inc).
    Notice: Undefined index: 14 in uc_order_condition_count_products() (Zeile 344 von /home/www/web254/html/klb/sites/all/modules/ubercart/uc_order/uc_order.rules.inc).
    Notice: Undefined index: 16 in uc_order_condition_count_products() (Zeile 344 von /home/www/web254/html/klb/sites/all/modules/ubercart/uc_order/uc_order.rules.inc).
    Notice: Undefined index: 17 in uc_order_condition_count_products() (Zeile 344 von /home/www/web254/html/klb/sites/all/modules/ubercart/uc_order/uc_order.rules.inc).

after some trying they go away with this patch:

$ diff uc_order.rules.inc.org uc_order.rules.inc
332c332,336
<     $totals[$product->nid] += $product->qty;
---
>       
>       if (isset($totals[$product->nid]))
>               $totals[$product->nid] += $product->qty;
>       else
>               $totals[$product->nid] = $product->qty;
339c343,344
<       $total += $totals[$product];
---
>         if (isset($totals[$product]))
>         $total += $totals[$product];