Make switching station only react to nodes from below

est31

2015-02-02 9444eff7f7853b0e4385adbd117cd6bace8dcb8f

 technic/helpers.lua

@@ -82,8 +82,8 @@
         else
            --use traditional string:format
            res = res .. (string.format(("%"..c), arg[i]))
            i = i + 1
         end
         i = i + 1
         percent = false
      elseif c == "%" then
         percent = true