More ML compatibility - fix up dragon mounts, thanks!

client/net/minecraft/src/BaseMod.java

@@ -367,6 +367,12 @@ public abstract class BaseMod implements cpw.mods.fml.common.modloader.BaseModPr
 
     }
 
+    @Override
+    public void serverCustomPayload(NetServerHandler handler, Packet250CustomPayload packet)
+    {
+
+    }
+
     @Override
     public void serverDisconnect() {
 
@@ -481,4 +487,9 @@ public abstract class BaseMod implements cpw.mods.fml.common.modloader.BaseModPr
         return null;
     }
 
+    public void clientCustomPayload(NetClientHandler handler, Packet250CustomPayload packet)
+    {
+
+    }
+
 }