From a077685e8b0758ac77a4d106bed68be703e0f4fa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Diego=20Mart=C3=ADnez?= <kaeza@users.sf.net>
Date: Sat, 16 Mar 2013 19:20:02 -0300
Subject: [PATCH] Fixed yard signs being able to overwrite other nodes

---
 signs_lib.lua | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/signs_lib.lua b/signs_lib.lua
index b68b2cce..2a672b6f 100644
--- a/signs_lib.lua
+++ b/signs_lib.lua
@@ -144,6 +144,11 @@ minetest.register_node(":default:sign_wall", {
 				itemstack:take_item()
 				return itemstack
 		elseif wdir == 1 then
+            local def = minetest.registered_nodes[minetest.env:get_node(pointed_thing.above).name]
+            if homedecor_node_is_owned(pointed_thing.above, placer)
+             or (not def.buildable_to) then
+                return
+            end
 		    minetest.env:add_node(above, {name = "signs:sign_yard", param2 = fdir})
 		    sign_info = signs_yard[fdir + 1]
 		else