BETA: Minor typo from [9106]

L2J_DataPack_BETA/dist/game/data/scripts/ai/npc/AbstractNpcAI.java

@@ -46,6 +46,12 @@ public abstract class AbstractNpcAI extends L2Script
 		return npc.getNpcId() + ".html";
 	}
 	
+	@Override
+	public String onAdvEvent(String event, L2Npc npc, L2PcInstance player)
+	{
+		return null;
+	}
+	
 	public AbstractNpcAI(String name, String descr)
 	{
 		super(-1, name, descr);