Staff of Absorption is now two handed

git-svn-id: http://svn.net-core.org/repos/t-engine4@2693 51575b47-30f0-44d4-a5cc-537603b46e54

game/modules/tome/data/general/objects/quest-artifacts.lua

@@ -24,6 +24,7 @@ newEntity{ define_as = "STAFF_ABSORPTION",
 	power_source = {unknown=true},
 	unique = true, quest=true,
 	slot = "MAINHAND",
+	slot_forbid = "OFFHAND",
 	type = "weapon", subtype="staff",
 	unided_name = "dark runed staff",
 	name = "Staff of Absorption",