xp drops: test server varbit for prayer active check

This fixes an issue where the xp drop recoloring would incorrectly
recolor the xpdrop if the prayer was flicked on client side in between
when the server tick happens and when the xp drop is created

runelite-client/src/main/java/net/runelite/client/plugins/experiencedrop/XpDropPlugin.java

@@ -181,7 +181,7 @@ public class XpDropPlugin extends Plugin
 	{
 		for (XpPrayer prayer : XpPrayer.values())
 		{
-			if (client.isPrayerActive(prayer.getPrayer()))
+			if (client.getServerVarbitValue(prayer.getPrayer().getVarbit()) == 1)
 			{
 				return prayer.getType();
 			}