fix exception if hq empty

client/src/main/java/ru/trader/controllers/PowerPlayController.java

@@ -284,8 +284,8 @@ public class PowerPlayController {
     }
 
     private void getMaxProfit(){
+        if (hqSystem.isPresent()){
             final Place hq = ModelFabric.get(hqSystem.get());
-        if (hq != null){
             Collection<Place> controlls = getControlSystems();
             result.clear();
             Collection<PowerPlayAnalyzator.IntersectData> near = analyzator.getMaxProfit(hq, controlls);