rollingDuration fleshed out

src/engine/net/client/handlers/ItemProductionMsgHandler.java

@@ -86,6 +86,7 @@ public class ItemProductionMsgHandler extends AbstractClientMsgHandler {
                 workOrder.prefixToken = msg.pToken;
                 workOrder.suffixToken = msg.sToken;
                 workOrder.itemName = msg.name;
+                workOrder.rollingDuration = ForgeManager.calcRollingDuration(workOrder);
 
                 // Validate vendor can roll this item