injector: pass array store index to field hook too

runelite-client/src/main/java/net/runelite/client/events/ExperienceChanged.java

@@ -27,5 +27,16 @@ package net.runelite.client.events;
 
 public class ExperienceChanged
 {
+	/** the index in the array which changed */
+	private int index;
 
+	public int getIndex()
+	{
+		return index;
+	}
+
+	public void setIndex(int index)
+	{
+		this.index = index;
+	}
 }