Fix NPE

Signed-off-by: Lixfel <agga-games@gmx.de>

src/de/steamwar/bungeecore/listeners/mods/Forge.java

@@ -80,8 +80,11 @@ public class Forge extends BasicListener {
 
         event.registerIntent(BungeeCore.get());
         ChannelPipeline pipeline = wrapper.getHandle().pipeline();
-        if(pipeline != null)
+        if(pipeline != null) {
-            pipeline.get(HandlerBoss.class).setHandler(new CustomPacketHandler(event));
+            HandlerBoss handlerBoss = pipeline.get(HandlerBoss.class);
+            if(handlerBoss != null)
+                handlerBoss.setHandler(new CustomPacketHandler(event));
+        }
     }
 
     private static class CustomPacketHandler extends PacketHandler {