Disabled configurable product children cause fatal error

[tgerulaitis]

If a configurable product has any children that are disabled, they are still going to be included in getUsedProductIds(), but will not be returned in the product collection. This causes a fatal error on the following line:

magento-best-seller-sort/app/code/community/Meanbee/BestSellerSort/Model/Attributes.php

Line 68 in 45ed593

$total -= $children->getItemById($childId)->getData(Meanbee_BestSellerSort_Helper_Data::ATTRIBUTE_NAME_QTY_ORDERED);