Fix NPE of KillcheckerVisualizer.hide

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

BauSystem_Main/src/de/steamwar/bausystem/features/killchecker/KillcheckerCommand.java

@@ -78,7 +78,7 @@ public class KillcheckerCommand extends SWCommand implements Listener {
         Player player = event.getPlayer();
         Set<Region> regions = new HashSet<>();
         visualizers.forEach((region, visualizer) -> {
-            if (visualizer.hide(player)) {
+            if (visualizer.disconnect(player)) {
                 regions.add(region);
             }
         });

BauSystem_Main/src/de/steamwar/bausystem/features/killchecker/KillcheckerVisualizer.java

@@ -97,6 +97,7 @@ public class KillcheckerVisualizer {
                     if (block.getType().isAir()) continue;
                     String name = block.getType().name();
                     if (!name.endsWith("_WOOL") && !name.endsWith("_STAINED_GLASS") && !name.endsWith("_CONCRETE") && !name.endsWith("_TERRACOTTA")) continue;
+                    if (name.equals("_GLAZED_TERRACOTTA")) continue;
                     Cuboid cuboid = create(block.getType(), x, y, z);
                     cuboids.add(cuboid);
                     for (int dx = (int) cuboid.getX(); dx <= cuboid.getDx(); dx++) {
@@ -378,6 +379,19 @@ public class KillcheckerVisualizer {
         bossBarService.remove(player, region, "killchecker");
         if (players.isEmpty()) {
             outline.close();
+            inner.close();
+            return true;
+        }
+        return false;
+    }
+
+    public boolean disconnect(Player player) {
+        players.remove(player);
+        areaPlayers.remove(player);
+        bossBarService.remove(player, region, "killchecker");
+        if (players.isEmpty()) {
+            outline.close();
+            inner.close();
             return true;
         }
         return false;