After changes using VQMOD getting php Notice undefined index

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Notice: Undefined index varname

Code: Select all

<file name="system/library/cart.php">
<operation error="skip">
			<search position="before"><![CDATA[public function getSubTotal()]]></search>
			<add><![CDATA[  	public function getSubTotalNew() {
		$totals = array();
        $total = 0;
		$suppliersProducts = $this->getProducts(true);
        foreach($suppliersProducts as $supplierId => $products)
        {
            foreach($products as $product)
            {
                if(array_key_exists($supplierId, $totals))
                {
                    $total = $totals["sup_".$supplierId];
                }
                else
                {
                    $total = 0;
                }
                $total += $product['total'];

                $totals["sup_".$supplierId] = $total;
            }
        }

		return $totals;
  	}]]></add>
		</operation>
</file>