Divide by Zero

[bhsmither]

There is a consequence of #2770, see: https://forums.cubecart.com/topic/56970-upgrade-to-643-now-getting-this-error/

In /classes/cubecart.class.php, near lines 125-127, find:

if ($product_review[0]['Score'] !== "") {
  $product['review_score'] = round($product_review[0]['Score']/$product_review[0]['Count'], 1);
}

Suggest:

if (!empty($product_review[0]['Count'])) {
  $product['review_score'] = round($product_review[0]['Score']/$product_review[0]['Count'], 1);
}

[abrookbanks]

I was going to suggest;

if (!empty($product_review[0]['Count']) && $product_review[0]['Count']>0) {

but 0 is empty.