All actors have a default esp range

git-svn-id: http://svn.net-core.org/repos/t-engine4@3634 51575b47-30f0-44d4-a5cc-537603b46e54

game/modules/tome/class/Actor.lua

@@ -124,6 +124,7 @@ function _M:init(t, no_default)
 	t.psi_rating = t.psi_rating or 0
 
 	t.esp = t.esp or {}
+	t.esp_range = t.esp_range or 10
 
 	t.talent_cd_reduction = t.talent_cd_reduction or {}