Fix remaining local issues

SpigotCore/SpigotCore_Main/src/de/steamwar/techhider/ChunkHider.java

@@ -22,32 +22,11 @@ package de.steamwar.techhider;
 import io.netty.buffer.ByteBuf;
 import lombok.Getter;
 import net.minecraft.world.level.block.state.BlockState;
+import org.bukkit.Material;
 import org.bukkit.entity.Player;
 
 import java.util.Collections;
 import java.util.Set;
-
-/*
- *   This file is a part of the SteamWar software.
- *
- *   Copyright (C) 2025 SteamWar.de-Serverteam
- *
- *   This program is free software: you can redistribute it and/or modify
- *   it under the terms of the GNU Affero General Public License as published by
- *   the Free Software Foundation, either version 3 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY; without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *   GNU Affero General Public License for more details.
- *
- *   You should have received a copy of the GNU Affero General Public License
- *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-package de.steamwar.techhider;
-
 import de.steamwar.Reflection;
 import io.netty.buffer.Unpooled;
 import net.minecraft.network.protocol.game.ClientboundLevelChunkPacketData;
@@ -232,7 +211,7 @@ public class ChunkHider {
                 if(blockIdsToObfuscate.contains(entry))
                     entry = blockIdToObfuscateTo;
 
-                if(entry == TechHider.AIR_ID)
+                if(entry == BlockIds.impl.materialToId(Material.AIR))
                     air = i;
                 else if(entry == blockIdToObfuscateTo)
                     target = i;

SpigotCore/SpigotCore_Main/src/de/steamwar/techhider/TechHiderUpdated.java

@@ -181,10 +181,13 @@ public class TechHiderUpdated {
         }
     }
 
+    private final Reflection.Field<SectionPos> sectionPosField = Reflection.getField(ClientboundSectionBlocksUpdatePacket.class, SectionPos.class, 0);
+    private final  Reflection.Field<short[]> oldPosField = Reflection.getField(ClientboundSectionBlocksUpdatePacket.class, short[].class, 0);
+    private final  Reflection.Field<BlockState[]> oldStatesField = Reflection.getField(ClientboundSectionBlocksUpdatePacket.class, BlockState[].class, 0);
     private ClientboundSectionBlocksUpdatePacket processSectionUpdate(Player p, ClientboundSectionBlocksUpdatePacket packet) {
-        SectionPos sectionPos = packet.sectionPos;
+        SectionPos sectionPos = sectionPosField.get(packet);
-        short[] oldPos = packet.positions;
+        short[] oldPos = oldPosField.get(packet);
-        BlockState[] oldStates = packet.states;
+        BlockState[] oldStates = oldStatesField.get(packet);
 
         boolean modified = false;
         List<Short> filteredPos = new ArrayList<>(oldPos.length);