Fix offhand remove item

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

BauSystem_Main/src/de/steamwar/bausystem/features/simulator/TNTSimulatorListener.java

@@ -98,7 +98,7 @@ public class TNTSimulatorListener implements Listener {
         if (ItemUtils.isItem(e.getPlayer().getInventory().getItemInMainHand(), "simulator")) {
             simulatorShowHide(e.getPlayer(), i -> null, PlayerInventory::getItemInMainHand, e.getTo());
             TNTSimulator tntSimulator = SimulatorStorage.getSimulator(e.getPlayer().getInventory().getItemInOffHand());
-            if (tntSimulator != null) SimulatorPreviewStorage.hide(e.getPlayer());
+            if (tntSimulator == null) SimulatorPreviewStorage.hide(e.getPlayer());
         } else {
             TNTSimulator tntSimulator = simulatorShowHide(e.getPlayer(), i -> null, PlayerInventory::getItemInOffHand, e.getTo());
             if (tntSimulator != null) SimulatorPreviewStorage.show(e.getPlayer(), tntSimulator);