Fix some global errors

ShadowNinja

2014-12-15 5382a88aefbd503c00500236510412e6f2b42f4e

 technic/machines/register/common.lua

@@ -105,8 +105,7 @@
   if minetest.get_item_group(node1.name, "tubedevice") > 0 then
      output_tube_connected = true
   end
   tube_time = meta:get_int("tube_time")
   tube_time = tube_time + tube_upgrade
   local tube_time = meta:get_int("tube_time") + tube_upgrade
   if tube_time >= 2 then
      tube_time = 0
      if output_tube_connected then