Fix PacketCache growing uncontrollably

BauSystem_Main/src/de/steamwar/bausystem/features/tpslimit/PacketCache.java

@@ -109,7 +109,7 @@ class PacketCache {
         }
         List<Entity> entities = Bukkit.getWorlds().get(0).getEntities().stream()
                 .filter(e -> !(e instanceof Player))
-                .filter(e -> !PacketCache.entities.contains(e))
+                .filter(e -> PacketCache.entities.add(e))
                 .collect(Collectors.toList());
 
         for (Entity entity : entities) {
@@ -127,7 +127,5 @@ class PacketCache {
             int fuse = tnt.getFuseTicks();
             packets.add(ChatWrapper.impl.getDataWatcherPacket(entity.getEntityId(), fuseDataWatcher, fuse - (fuse % 5) + 1));
         }
-
-        entities.addAll(entities);
     }
 }