Properly fix item duplication bug (#557)

Credit to prplz for figuring out the real issue

Spigot-Server-Patches/0193-Properly-fix-item-duplication-bug.patch

@@ -0,0 +1,35 @@
+From 5aa3d868dd87e2a3ec404944b7f0c01b5320836f Mon Sep 17 00:00:00 2001
+From: Alfie Cleveland <alfeh@me.com>
+Date: Tue, 27 Dec 2016 01:57:57 +0000
+Subject: [PATCH] Properly fix item duplication bug
+
+Credit to prplz for figuring out the real issue
+
+diff --git a/src/main/java/net/minecraft/server/EntityPlayer.java b/src/main/java/net/minecraft/server/EntityPlayer.java
+index 523d916..60219f9 100644
+--- a/src/main/java/net/minecraft/server/EntityPlayer.java
++++ b/src/main/java/net/minecraft/server/EntityPlayer.java
+@@ -1328,7 +1328,7 @@ public class EntityPlayer extends EntityHuman implements ICrafting {
+ 
+     @Override
+     protected boolean isFrozen() {
+-        return super.isFrozen() || !getBukkitEntity().isOnline();
++        return super.isFrozen() || (this.playerConnection != null && this.playerConnection.isDisconnected()); // Paper
+     }
+ 
+     public void reset() {
+diff --git a/src/main/java/net/minecraft/server/PlayerConnection.java b/src/main/java/net/minecraft/server/PlayerConnection.java
+index 167ccbe..89a0752 100644
+--- a/src/main/java/net/minecraft/server/PlayerConnection.java
++++ b/src/main/java/net/minecraft/server/PlayerConnection.java
+@@ -2547,6 +2547,6 @@ public class PlayerConnection implements PacketListenerPlayIn, ITickable {
+ 
+     // CraftBukkit start - Add "isDisconnected" method
+     public final boolean isDisconnected() {
+-        return !this.player.joining && !this.networkManager.isConnected();
++        return (!this.player.joining && !this.networkManager.isConnected()) || this.processedDisconnect; // Paper
+     }
+ }
+-- 
+2.9.3 (Apple Git-75)
+