Fix bug when a modloader mod is run on a dedicated server and has a

connection handler assigned to it. Hi SmartMoving! Perhaps you should try
@Mod instead of BaseMod?

fml/common/cpw/mods/fml/common/modloader/ModLoaderConnectionHandler.java

@@ -39,7 +39,7 @@ public class ModLoaderConnectionHandler implements IConnectionHandler
     @Override
     public void connectionClosed(INetworkManager manager)
     {
-        if (!ModLoaderHelper.sidedHelper.clientConnectionClosed(manager, mod))
+        if (ModLoaderHelper.sidedHelper==null || !ModLoaderHelper.sidedHelper.clientConnectionClosed(manager, mod))
         {
             mod.serverDisconnect();
             mod.onClientLogout(manager);