Pass name as arg 1 on registration.

init.lua

@@ -679,6 +679,7 @@ end
 function entity_ai.register_entity(name, def)
 	-- FIXME add some sort of entity registration table
 	-- FIXME handle spawning and reloading?
+	def.name = name
 	def.physical = def.physical or true
 	def.visual = def.visual or "mesh"
 	def.makes_footstep_sound = def.makes_footstep_sound or true

sheep.lua

@@ -174,7 +174,6 @@ local sheep_script = {
 }
 
 entity_ai.register_entity("entity_ai:sheep", {
-	name = "entity_ai:sheep",
 	script = sheep_script,
 	mesh = "sheep.b3d",
 	textures = {"sheep_fur.png"},