Fix placing certain signs (#29)

* Fix placing certain signs

This fixes #1 by removing node extensions before placing, just incase player got a hold of certain sign nodes they shouldnt have.

* fix typo

fix typo

api.lua

@@ -943,7 +943,13 @@ function signs_lib.after_place_node(pos, placer, itemstack, pointed_thing, locke
 	local controls = placer:get_player_control()
 
 	local signname = itemstack:get_name()
+
+	-- in case player has sign nodes they shouldn't, remove extensions for normal sign
 	local no_wall_name = string.gsub(signname, "_wall", "")
+	no_wall_name = string.gsub(no_wall_name, "_yard", "")
+	no_wall_name = string.gsub(no_wall_name, "_hanging", "")
+	no_wall_name = string.gsub(no_wall_name, "_onpole_horiz", "")
+	no_wall_name = string.gsub(no_wall_name, "_onpole", "")
 
 	local def = minetest.registered_items[signname]