More sanity checks on the nodeside() function, courtesy ShadowNinja

diff --git a/autoplace_tubes.lua b/autoplace_tubes.lua
index 4bb31bc3e4d4db31e91de360004d0e3542a147c2..518caf8320db4f4ea4597586c0dad5364641b3ec 100644 (file)
--- a/autoplace_tubes.lua
+++ b/autoplace_tubes.lua
@@ -28,7 +28,11 @@ end
 
 --a function for determining which side of the node we are on
 local function nodeside(node, tubedir)
-       if not tubedir or not node or not node.param2 then return "back" end
+       if not tubedir or
+          not node or
+          not (type(node.param2) == "number" and node.param2 > 0 and node.param2 < 23) then
+               return "back"
+       end
 
     --get a vector pointing back
     local backdir = minetest.facedir_to_dir(node.param2)