Fix Paladin vs. Undead vault when appearing in the Dreadfell

git-svn-id: http://svn.net-core.org/repos/t-engine4@3942 51575b47-30f0-44d4-a5cc-537603b46e54

game/modules/tome/data/zones/dreadfell/zone.lua

@@ -61,7 +61,7 @@ return {
 		},
 	},
 	post_process = function(level)
-		for uid, e in pairs(level.entities) do e.faction="dreadfell" end
+		for uid, e in pairs(level.entities) do e.faction = e.hard_faction or "dreadfell" end
 
 		-- Put lore near the up stairs
 		if game.zone.created_lore and game.zone.created_lore[level.level] then