Fix Warden Job

Accidentally forgot to include a bit of code to count the warden.

code/modules/events/event_dynamic.dm

@@ -190,6 +190,7 @@ var/list/event_last_fired = list()
 	active_with_role["Janitor"] = 0
 	active_with_role["Gardener"] = 0
 	active_with_role["HOS"] = 0
+	active_with_role["Warden"] = 0
 
 	for(var/mob/M in player_list)
 		if(!M.mind || !M.client || M.client.is_afk(10 MINUTES)) // longer than 10 minutes AFK counts them as inactive