painful protection in Subtotal.php (#650)

protection through which I lost 4 hours of life

Author: henrykbrzoska

app/code/core/Mage/Sales/Model/Quote/Address/Total/Subtotal.php

@@ -112,7 +112,7 @@ protected function _initItem($address, $item)
             $item->setPrice($finalPrice)
                 ->setBaseOriginalPrice($finalPrice);
             $item->calcRowTotal();
-        } else if (!$quoteItem->getParentItem() && !$item->getHasError()) {
+        } else if (!$quoteItem->getParentItem()) {
             $finalPrice = $product->getFinalPrice($quoteItem->getQty());
             $item->setPrice($finalPrice)
                 ->setBaseOriginalPrice($finalPrice);