fix crafting recipe collision with screwdriver-mod (minetest_game)

[wischi-chr]

following recipe is registered for xdecor:hammer and screwdriver:screwdriver.

recipe = {
  {"default:steel_ingot"},
  {"group:stick"}
}

Most layman will use mods on combination with the minetest_game subgame, so imo there should be no collisions with mods from this subgame (unless there is a very good reason)

I changed it to

recipe = {`
  {"default:steel_ingot", "group:stick", "default:steel_ingot"},
  {"", "group:stick", ""},
  {"", "group:stick", ""}
}

so it look much more like a hammer and does not collide with mods from minetest_game.

[kilbith]

Ah good catch, thanks. Merged a3abfcf