Fix NPE during server initialization from server list pings

Spigot-API-Patches/0086-Add-extended-PaperServerListPingEvent.patch

@@ -1,4 +1,4 @@
-From 49a9d5dd768670e0cf6bb85313727ad57bc8428e Mon Sep 17 00:00:00 2001
+From 4987254c0fc69b5f08d88f3dec52e37a6e68140d Mon Sep 17 00:00:00 2001
 From: Minecrell <minecrell@minecrell.net>
 Date: Wed, 11 Oct 2017 15:55:38 +0200
 Subject: [PATCH] Add extended PaperServerListPingEvent
@@ -8,10 +8,10 @@ and allows full control of the response sent to the client.
 
 diff --git a/src/main/java/com/destroystokyo/paper/event/server/PaperServerListPingEvent.java b/src/main/java/com/destroystokyo/paper/event/server/PaperServerListPingEvent.java
 new file mode 100644
-index 00000000..dd1deafd
+index 00000000..b2a8476c
 --- /dev/null
 +++ b/src/main/java/com/destroystokyo/paper/event/server/PaperServerListPingEvent.java
-@@ -0,0 +1,319 @@
+@@ -0,0 +1,320 @@
 +package com.destroystokyo.paper.event.server;
 +
 +import static java.util.Objects.requireNonNull;
@@ -185,7 +185,8 @@ index 00000000..dd1deafd
 +     * Returns the protocol version that will be sent as the protocol version
 +     * of the server to the client.
 +     *
-+     * @return The protocol version of the server
++     * @return The protocol version of the server, or {@code -1} if the server
++     * has not finished initialization yet
 +     */
 +    public int getProtocolVersion() {
 +        return protocolVersion;
@@ -366,5 +367,5 @@ index 04804706..44563482 100644
 +    // Paper end
  }
 -- 
-2.18.0
+2.20.1