-function stairs.register_stair_and_slab(subname, recipeitem, groups, images, desc_stair, desc_slab)
- stairs.register_stair(subname, recipeitem, groups, images, desc_stair)
- stairs.register_slab(subname, recipeitem, groups, images, desc_slab)
+function stairs.register_stair_and_slab(subname, recipeitem, groups, images, desc_stair, desc_slab, sounds)
+ stairs.register_stair(subname, recipeitem, groups, images, desc_stair, sounds)
+ stairs.register_slab(subname, recipeitem, groups, images, desc_slab, sounds)