Fix some compile errors

Spigot-Server-Patches/Make-legacy-ping-handler-more-reliable.patch

@@ -28,7 +28,7 @@ respond to the request.
 [2]: https://netty.io/wiki/user-guide-for-4.x.html#wiki-h4-13
 
 diff --git a/src/main/java/net/minecraft/server/LegacyPingHandler.java b/src/main/java/net/minecraft/server/LegacyPingHandler.java
-index c8c5df7f9..9bc1cce3f 100644
+index c8c5df7f95..06aefcb638 100644
 --- a/src/main/java/net/minecraft/server/LegacyPingHandler.java
 +++ b/src/main/java/net/minecraft/server/LegacyPingHandler.java
 @@ -0,0 +0,0 @@ public class LegacyPingHandler extends ChannelInboundHandlerAdapter {
@@ -138,7 +138,7 @@ index c8c5df7f9..9bc1cce3f 100644
 +        buf.release();
 +        this.buf = null;
 +
-+        a.debug("Ping: (1.6) from {}", ctx.channel().remoteAddress());
++        LOGGER.debug("Ping: (1.6) from {}", ctx.channel().remoteAddress());
 +
 +        String response = String.format("\u00a71\u0000%d\u0000%s\u0000%s\u0000%d\u0000%d",
 +                Byte.MAX_VALUE, server.getVersion(), server.getMotd(), server.getPlayerCount(), server.getMaxPlayers());