Fix chunk leak issue with queued light updates

Spigot-Server-Patches/MC-Utils.patch

@@ -15,6 +15,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +
 +import org.bukkit.Location;
 +
++import javax.annotation.Nullable;
 +import java.util.regex.Pattern;
 +
 +public class MCUtil {
@@ -129,6 +130,27 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +        final int modZ = pos.getZ() & 15;
 +        return (modX == 0 || modX == 15 || modZ == 0 || modZ == 15);
 +    }
++
++    /**
++     * Gets a chunk without changing its boolean for should unload
++     * @param world
++     * @param x
++     * @param z
++     * @return
++     */
++    @Nullable public static Chunk getLoadedChunkWithoutMarkingActive(World world, int x, int z) {
++        return ((ChunkProviderServer) world.chunkProvider).chunks.get(ChunkCoordIntPair.a(x, z));
++    }
++    /**
++     * Gets a chunk without changing its boolean for should unload
++     * @param provider
++     * @param x
++     * @param z
++     * @return
++     */
++    @Nullable public static Chunk getLoadedChunkWithoutMarkingActive(ChunkProviderServer provider, int x, int z) {
++        return provider.chunks.get(ChunkCoordIntPair.a(x, z));
++    }
 +}
 diff --git a/src/main/java/net/minecraft/server/NBTTagCompound.java b/src/main/java/net/minecraft/server/NBTTagCompound.java
 index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644