Fix glitch in tube autorouter

(brain-o in how I was handling unknown/bad nodes being passed to it.  this
works better and lets the code do its job properly).

diff --git a/autoplace_tubes.lua b/autoplace_tubes.lua
index dfac997f590c9bc02192f58a357ccb107afd2733..ba181c013657e48cfaa8f3bd0fa9b68bcf4c32cb 100644 (file)
--- a/autoplace_tubes.lua
+++ b/autoplace_tubes.lua
@@ -17,11 +17,7 @@ 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 (type(node.param2) == "number" and node.param2 > 0 and node.param2 < 23) then
-               return "back"
-       end
+       if node and (node.param2 < 0 or node.param2 > 23) then node.param2 = 0 end
 
        --get a vector pointing back
        local backdir = minetest.facedir_to_dir(node.param2)