Do not run converters twice.

Maciej 'agaran' Pijanka

2017-03-15 10307f23a78b33af50dc4a5f3d1baafb4ee4b0d9

 technic/machines/other/frames.lua

@@ -320,7 +320,7 @@
         else
            --local pointed_thing = {type = "node", under = pos}
            if pointed_thing then
               minetest.item_place_node(itemstack, placer, pointed_thing)
               return minetest.item_place_node(itemstack, placer, pointed_thing)
            end
         end
      end,