Fix errors when on vanilla server

core/src/main/java/com/seibel/distanthorizons/core/multiplayer/client/ClientNetworkState.java

@@ -80,6 +80,11 @@ public class ClientNetworkState implements Closeable
 	
 	private String[] f3Log()
 	{
+		if (!this.client.isActive())
+		{
+			return new String[]{"Waiting for connection info..."};
+		}
+		
 		if (!this.client.isClosed())
 		{
 			return new String[]{

core/src/main/java/com/seibel/distanthorizons/core/network/netty/NettyClient.java

@@ -59,6 +59,8 @@ public class NettyClient extends NettyEventSource implements INettyConnection, A
 			EConnectionState.CLOSED
 	);
 	private final AtomicReference<EConnectionState> connectionState = new AtomicReference<>(EConnectionState.INITIAL);
+	/** Indicates whether the client is working. */
+	public boolean isActive() { return this.connectionState.get() != EConnectionState.INITIAL && !this.isClosed(); }
 	/** Indicates whether the client is closed(-ing) and should not be used. */
 	public boolean isClosed() { return closedStates.contains(this.connectionState.get()); }
 	
@@ -188,6 +190,10 @@ public class NettyClient extends NettyEventSource implements INettyConnection, A
 	@Override
 	public ChannelHandlerContext getChannelContext()
 	{
+		if (this.channel == null)
+		{
+			return null;
+		}
 		return this.channel.pipeline().context(NettyMessageHandler.class);
 	}
 	
@@ -200,7 +206,8 @@ public class NettyClient extends NettyEventSource implements INettyConnection, A
 	@Override
     public void close() 
 	{
-		if (this.connectionState.getAndSet(EConnectionState.CLOSED) == EConnectionState.CLOSED)
+		EConnectionState stateChangeResult = this.connectionState.getAndSet(EConnectionState.CLOSED);
+		if (stateChangeResult == EConnectionState.CLOSED || stateChangeResult == EConnectionState.INITIAL)
 		{
 			return;
 		}