skeleton moddable tiles

git-svn-id: http://svn.net-core.org/repos/t-engine4@3706 51575b47-30f0-44d4-a5cc-537603b46e54

game/modules/tome/data/birth/races/undead.lua

@@ -159,6 +159,7 @@ newBirthDescriptor
 		fear_immune = 1,
 		no_breath = 1,
 		blood_color = colors.GREY,
+		moddable_tile = "skeleton",
 	},
 	experience = 1.4,
 }