Fix NPE in AnvilDamageEvent - Closes #1331

Spigot-Server-Patches/0323-AnvilDamageEvent.patch

@@ -1,11 +1,11 @@
-From 259073abd3c6dd5d4a3434c920db539e73f956cc Mon Sep 17 00:00:00 2001
+From aba330fc2adbe136ffb43bd42ba13a203279a0ea Mon Sep 17 00:00:00 2001
 From: BillyGalbreath <Blake.Galbreath@GMail.com>
 Date: Fri, 20 Jul 2018 23:37:03 -0500
 Subject: [PATCH] AnvilDamageEvent
 
 
 diff --git a/src/main/java/net/minecraft/server/ContainerAnvil.java b/src/main/java/net/minecraft/server/ContainerAnvil.java
-index fb3413d81e..9f20348d0c 100644
+index fb3413d81e..3b23ef9863 100644
 --- a/src/main/java/net/minecraft/server/ContainerAnvil.java
 +++ b/src/main/java/net/minecraft/server/ContainerAnvil.java
 @@ -73,6 +73,16 @@ public class ContainerAnvil extends Container {
@@ -13,7 +13,7 @@ index fb3413d81e..9f20348d0c 100644
                      if (!entityhuman.abilities.canInstantlyBuild && iblockdata.a(TagsBlock.y) && entityhuman.getRandom().nextFloat() < 0.12F) {
                          IBlockData iblockdata1 = BlockAnvil.a_(iblockdata);
 +                        // Paper start
-+                        com.destroystokyo.paper.event.block.AnvilDamagedEvent event = new com.destroystokyo.paper.event.block.AnvilDamagedEvent(getBukkitView(), org.bukkit.craftbukkit.block.data.CraftBlockData.fromData(iblockdata1));
++                        com.destroystokyo.paper.event.block.AnvilDamagedEvent event = new com.destroystokyo.paper.event.block.AnvilDamagedEvent(getBukkitView(), iblockdata1 != null ? org.bukkit.craftbukkit.block.data.CraftBlockData.fromData(iblockdata1) : null);
 +                        if (!event.callEvent()) {
 +                            return itemstack;
 +                        } else if (event.getDamageState() == com.destroystokyo.paper.event.block.AnvilDamagedEvent.DamageState.BROKEN) {