Fix Freeze Exceptions

BauSystem_Main/src/de/steamwar/bausystem/commands/CommandFreeze.java

@@ -24,6 +24,7 @@ import de.steamwar.bausystem.world.Region;
 import de.steamwar.core.Core;
 import org.bukkit.Bukkit;
 import org.bukkit.Material;
+import org.bukkit.entity.EntityType;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.block.*;
 import org.bukkit.event.entity.EntityChangeBlockEvent;
@@ -53,14 +54,16 @@ public class CommandFreeze extends RegionToggleCommand {
 
     @EventHandler
     public void onEntitySpawn(EntitySpawnEvent e) {
-        if (Region.getRegion(e.getLocation()).isFreeze()) e.setCancelled(true);
+        if (Region.getRegion(e.getLocation()).isFreeze()) {
+            e.setCancelled(true);
             if (Core.getVersion() == 15) return;
-        if (e.isCancelled()) {
+            if (e.getEntityType() == EntityType.PRIMED_TNT) {
                 Bukkit.getScheduler().runTaskLater(BauSystem.getPlugin(), () -> {
                     e.getLocation().getBlock().setType(Material.TNT, false);
                 }, 1L);
             }
         }
+    }
 
     @EventHandler
     public void onBlockCanBuild(BlockCanBuildEvent e) {