Fix NPE during server initialization from server list pings

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

@@ -8,7 +8,7 @@ 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 +0,0 @@
@@ -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;

Spigot-Server-Patches/Implement-extended-PaperServerListPingEvent.patch

@@ -60,7 +60,7 @@ index 000000000..a2a409e63
 +}
 diff --git a/src/main/java/com/destroystokyo/paper/network/StandardPaperServerListPingEventImpl.java b/src/main/java/com/destroystokyo/paper/network/StandardPaperServerListPingEventImpl.java
 new file mode 100644
-index 000000000..26e3031d2
+index 000000000..a85466bc7
 --- /dev/null
 +++ b/src/main/java/com/destroystokyo/paper/network/StandardPaperServerListPingEventImpl.java
 @@ -0,0 +0,0 @@
@@ -90,7 +90,7 @@ index 000000000..26e3031d2
 +    private GameProfile[] originalSample;
 +
 +    private StandardPaperServerListPingEventImpl(MinecraftServer server, NetworkManager networkManager, ServerPing ping) {
-+        super(server, new PaperStatusClient(networkManager), ping.getServerData().getProtocolVersion(), server.server.getServerIcon());
++        super(server, new PaperStatusClient(networkManager), ping.getServerData() != null ? ping.getServerData().getProtocolVersion() : -1, server.server.getServerIcon());
 +        this.originalSample = ping.getPlayers() == null ? null : ping.getPlayers().getSample(); // GH-1473 - pre-tick race condition NPE
 +    }
 +