Fix chunk leak issue with queued light updates

Spigot-Server-Patches/0004-MC-Utils.patch

@@ -1,4 +1,4 @@
-From 510ca29c8152d471740af9cf9bd99f3f9c0af690 Mon Sep 17 00:00:00 2001
+From 3e274493dd2ceaa090253d2797e7c5bdbd55d2d5 Mon Sep 17 00:00:00 2001
 From: Aikar <aikar@aikar.co>
 Date: Mon, 28 Mar 2016 20:55:47 -0400
 Subject: [PATCH] MC Utils
@@ -7,14 +7,15 @@ Collection of utils to help reduce NMS diff
 
 diff --git a/src/main/java/net/minecraft/server/MCUtil.java b/src/main/java/net/minecraft/server/MCUtil.java
 new file mode 100644
-index 0000000..ffd3152
+index 0000000..d3a256c
 --- /dev/null
 +++ b/src/main/java/net/minecraft/server/MCUtil.java
-@@ -0,0 +1,119 @@
+@@ -0,0 +1,141 @@
 +package net.minecraft.server;
 +
 +import org.bukkit.Location;
 +
++import javax.annotation.Nullable;
 +import java.util.regex.Pattern;
 +
 +public class MCUtil {
@@ -129,6 +130,27 @@ index 0000000..ffd3152
 +        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 c01cecb..7fa49dd 100644