Ensure ProtocolLib functions in 1.6.4 and below.

ProtocolLib/src/main/java/com/comphenix/protocol/injector/player/NetworkServerInjector.java

@@ -177,7 +177,6 @@ class NetworkServerInjector extends PlayerInjector {
 			callbackFilter = new SendMethodFilter();
 		}
 		
-		ex.setClassLoader(classLoader);
 		ex.setSuperclass(serverClass);
 		ex.setCallbacks(new Callback[] { sendPacketCallback, noOpCallback });
 		ex.setCallbackFilter(callbackFilter);

ProtocolLib/src/main/java/com/comphenix/protocol/injector/player/PlayerInjector.java

@@ -126,9 +126,6 @@ public abstract class PlayerInjector implements SocketInjector {
 	// Handle errors
 	protected ErrorReporter reporter;
 	
-	// Used to construct proxy objects
-	protected ClassLoader classLoader;
-	
 	// Previous markers
 	protected Map<Object, NetworkMarker> queuedMarkers = new MapMaker().weakKeys().makeMap();
 	protected InterceptWritePacket writePacketInterceptor; 

ProtocolLib/src/main/java/com/comphenix/protocol/reflect/cloning/BukkitCloner.java

@@ -17,12 +17,15 @@
 
 package com.comphenix.protocol.reflect.cloning;
 
+import java.util.List;
+
 import com.comphenix.protocol.reflect.EquivalentConverter;
 import com.comphenix.protocol.utility.MinecraftReflection;
 import com.comphenix.protocol.wrappers.BukkitConverters;
 import com.comphenix.protocol.wrappers.ChunkPosition;
 import com.comphenix.protocol.wrappers.WrappedDataWatcher;
 import com.comphenix.protocol.wrappers.WrappedServerPing;
+import com.google.common.collect.Lists;
 
 /**
  * Represents an object that can clone a specific list of Bukkit- and Minecraft-related objects.
@@ -31,8 +34,20 @@ import com.comphenix.protocol.wrappers.WrappedServerPing;
  */
 public class BukkitCloner implements Cloner {
 	// List of classes we support
-	private Class<?>[] clonableClasses = { MinecraftReflection.getItemStackClass(), MinecraftReflection.getChunkPositionClass(), 
-										   MinecraftReflection.getDataWatcherClass(), MinecraftReflection.getServerPingClass() };
+	private Class<?>[] clonableClasses;
+	
+	public BukkitCloner() {
+		List<Class<?>> classes = Lists.newArrayList();
+		
+		classes.add(MinecraftReflection.getItemStackClass());
+		classes.add(MinecraftReflection.getChunkPositionClass());
+		classes.add(MinecraftReflection.getDataWatcherClass());
+
+		if (MinecraftReflection.isUsingNetty()) {
+			classes.add(MinecraftReflection.getServerPingClass());
+		}
+		this.clonableClasses = classes.toArray(new Class<?>[0]);
+	}
 			
 	private int findMatchingClass(Class<?> type) {
 		// See if is a subclass of any of our supported superclasses