null check tracker for entity metadata update - Fixes #3070

Spigot-Server-Patches/0355-Update-entity-Metadata-for-all-tracked-players.patch

@@ -1,11 +1,11 @@
-From 4526182f1a02ee548d2f7fa856a0ce04fdb81d0c Mon Sep 17 00:00:00 2001
+From dd6dba897fb9a1838363f2bd89da221a9f6ae91b Mon Sep 17 00:00:00 2001
 From: AgentTroll <woodyc40@gmail.com>
 Date: Fri, 22 Mar 2019 22:24:03 -0700
 Subject: [PATCH] Update entity Metadata for all tracked players
 
 
 diff --git a/src/main/java/net/minecraft/server/EntityTrackerEntry.java b/src/main/java/net/minecraft/server/EntityTrackerEntry.java
-index 3ff7a7b4..3a88c9a6 100644
+index 3ff7a7b4a8..3a88c9a670 100644
 --- a/src/main/java/net/minecraft/server/EntityTrackerEntry.java
 +++ b/src/main/java/net/minecraft/server/EntityTrackerEntry.java
 @@ -387,6 +387,12 @@ public class EntityTrackerEntry {
@@ -22,18 +22,25 @@ index 3ff7a7b4..3a88c9a6 100644
          this.f.accept(packet);
          if (this.tracker instanceof EntityPlayer) {
 diff --git a/src/main/java/net/minecraft/server/PlayerConnection.java b/src/main/java/net/minecraft/server/PlayerConnection.java
-index 94d3d602..eee96c3a 100644
+index 94d3d602cc..f496006f3c 100644
 --- a/src/main/java/net/minecraft/server/PlayerConnection.java
 +++ b/src/main/java/net/minecraft/server/PlayerConnection.java
-@@ -2006,7 +2006,7 @@ public class PlayerConnection implements PacketListenerPlayIn {
+@@ -2006,7 +2006,14 @@ public class PlayerConnection implements PacketListenerPlayIn {
  
                      if (event.isCancelled() || this.player.inventory.getItemInHand() == null || this.player.inventory.getItemInHand().getItem() != origItem) {
                          // Refresh the current entity metadata
 -                        this.sendPacket(new PacketPlayOutEntityMetadata(entity.getId(), entity.datawatcher, true));
-+                        entity.tracker.broadcast(new PacketPlayOutEntityMetadata(entity.getId(), entity.datawatcher, true)); // Paper - update entity for all players
++                        // Paper start - update entity for all players
++                        PacketPlayOutEntityMetadata packet = new PacketPlayOutEntityMetadata(entity.getId(), entity.datawatcher, true);
++                        if (entity.tracker != null) {
++                            entity.tracker.broadcast(packet);
++                        } else {
++                            this.sendPacket(packet);
++                        }
++                        // Paper end
                      }
  
                      if (event.isCancelled()) {
 -- 
-2.25.1.windows.1
+2.26.2