Hotfix NPE in FreezeListener

Signed-off-by: yoyosource <yoyosource@nidido.de>

BauSystem_Main/src/de/steamwar/bausystem/features/region/FreezeListener.java

@@ -100,7 +100,9 @@ public class FreezeListener implements Listener, ScoreboardElement {
 
     @EventHandler
     public void onInventoryMoveEvent(InventoryMoveItemEvent e) {
-        if (Region.getRegion(e.getDestination().getLocation()).get(Flag.FREEZE) == FreezeMode.ACTIVE) {
+        if (e.getDestination().getLocation() != null && Region.getRegion(e.getDestination().getLocation()).get(Flag.FREEZE) == FreezeMode.ACTIVE) {
+            e.setCancelled(true);
+        } else if (e.getSource().getLocation() != null && Region.getRegion(e.getSource().getLocation()).get(Flag.FREEZE) == FreezeMode.ACTIVE) {
             e.setCancelled(true);
         }
     }