Paper/Spigot-Server-Patches/0504-Fix-enderdragon-exp-dupe.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Fri, 12 Jun 2020 22:25:11 -0700
Subject: [PATCH] Fix enderdragon exp dupe

Properly track death stage when unloading/loading in the
dragon

diff --git a/src/main/java/net/minecraft/server/EntityEnderDragon.java b/src/main/java/net/minecraft/server/EntityEnderDragon.java
index 0e7c5dd9224d06fecf75c00c0c56d610a8fa8f4c..6b2c5e8d4640e19d33cbfe76d2399e6100890dbc 100644
--- a/src/main/java/net/minecraft/server/EntityEnderDragon.java
+++ b/src/main/java/net/minecraft/server/EntityEnderDragon.java
@@ -830,6 +830,7 @@ public class EntityEnderDragon extends EntityInsentient implements IMonster {
     public void saveData(NBTTagCompound nbttagcompound) {
         super.saveData(nbttagcompound);
         nbttagcompound.setInt("DragonPhase", this.bG.a().getControllerPhase().b());
+        nbttagcompound.setInt("Paper.DeathTick", this.deathAnimationTicks); // Paper
     }
 
     @Override
@@ -838,6 +839,7 @@ public class EntityEnderDragon extends EntityInsentient implements IMonster {
         if (nbttagcompound.hasKey("DragonPhase")) {
             this.bG.setControllerPhase(DragonControllerPhase.getById(nbttagcompound.getInt("DragonPhase")));
         }
+        this.deathAnimationTicks = nbttagcompound.getInt("Paper.DeathTick"); // Paper
 
     }