Ensure pipeline parts exist before injecting #1168

bungee/src/main/java/us/myles/ViaVersion/bungee/handlers/BungeeChannelInitializer.java

@@ -30,6 +30,9 @@ public class BungeeChannelInitializer extends ChannelInitializer<SocketChannel>
         new ProtocolPipeline(info);
         // Add originals
         this.method.invoke(this.original, socketChannel);
+
+        if (socketChannel.pipeline().get("packet-encoder") == null) return; // Don't inject if no packet-encoder
+        if (socketChannel.pipeline().get("packet-decoder") == null) return; // Don't inject if no packet-decoder
         // Add our transformers
         BungeeEncodeHandler encoder = new BungeeEncodeHandler(info);
         BungeeDecodeHandler decoder = new BungeeDecodeHandler(info);