Staves of ruination give nature damage instead of poison damage boost

git-svn-id: http://svn.net-core.org/repos/t-engine4@4077 51575b47-30f0-44d4-a5cc-537603b46e54

game/modules/tome/data/general/objects/egos/staves.lua

@@ -462,7 +462,7 @@ newEntity{
 		combat_spellpower = resolvers.mbonus_material(12, 3),
 		inc_damage = {
 			[DamageType.BLIGHT] = resolvers.mbonus_material(10, 5),
-			[DamageType.POISON] = resolvers.mbonus_material(10, 5),
+			[DamageType.NATURE] = resolvers.mbonus_material(10, 5),
 		},
 	},
 }