Plugin template: fix callback function signature

plugins/template/YOUR_PLUGIN_NAME.php

@@ -33,15 +33,14 @@ class plgVmShipmentRulesYOUR_PLUGIN_NAME extends VmPlugin {
 	  *  You can add new variables to the $cartvals array or modify existing ones. They will be directly 
 	  *  available in all rules.
 	  *  This trigger will be first called right before any rule is evaluated. In that case, $products 
-	  *  will contain all products in the cart and $cart_prices will be an arrow containing the calculated
-	  *  prices of the order.
+	  *  will contain all products in the cart.
 	  *  Please notice that this function might also be called for only a subset of products of the cart
 	  *  when the plugin evaluates a scoping function like evaluate_for_categories(...).
-	  *  In that case, $cart_prices will be NULL and the $products array will hold only those products that 
+	  *  In that case, the $products array will hold only those products that 
 	  *  actually match the filter, and only those should be used to calculate your custom variables.
-	  *  So you can not in general rely on the cart_prices argument to hold the properly summed prices.
+	  *  So you can not in general rely on the $cart->cart_prices argument to hold the properly summed prices.
 	  */
-	function onVmShippingRulesGetCartValues(&$cartvals, $cart, $products, $method, $cart_prices) {
+	function onVmShippingRulesGetCartValues(&$cartvals, $cart, $products, $method) {
 		if ($cart_prices) {
 			// Called for the whole cart...
 		} else {