Fix Coupons variable not being available

includes/rules_shipping_framework_woocommerce_advanced.php

@@ -42,10 +42,8 @@ class RulesShippingFrameworkWooCommerceAdvanced extends RulesShippingFrameworkWo
 	}
 	
 	protected function addCustomCartValues ($cart, $products, $method, &$values) {
-		$data = array(
-			'coupons'    => $cart['applied_coupons'],
-		);
-		return $data;
+		$values['coupons'] = $cart['applied_coupons'];
+		return $values;
 	}