helper cart.php line 2128

[galicin]

When using "Purchase Quantity Steps" for product.
/components/com_virtuemart/helpers/cart.php line 2128 with error.

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$step = $product->step_order_level;
if ($step != 0 && ($quantity%$step)!= 0) {
$quantity = $quantity + ($quantity%$step);
$product->errorMsg = vmText::sprintf('COM_VIRTUEMART_CART_STEP_ORDER', $step);
vmWarn($product->errorMsg);
if (!$checkForDisable) return false;
}
Error in the mathematical sign: instead of a plus sign, there should be a minus.
In the script line 2128 -

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$quantity = $quantity + ($quantity%$step);
Right so -

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$quantity = $quantity - ($quantity%$step);

Sorry for my English.