Refactor warehouse part two.

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

@@ -529,7 +529,7 @@ public class PlaceAssetMsgHandler extends AbstractClientMsgHandler {
         if (validateCityBuildingPlacement(serverZone, msg, origin, player, buildingList) == false)
             return false;
 
-        if (cityObject.getWarehouse() != null) {
+        if (cityObject.warehouse != null) {
             PlaceAssetMsg.sendPlaceAssetError(origin, 50, "");  //"You can only have one warehouse"
             return false;
         }