Add stairsplus support if moreblocks loaded.

nether/depends.txt

@@ -3,6 +3,7 @@ creative?
 glow
 riesenpilz
 stairs
+moreblocks?
 vector_extras
 fence_registration?
 function_delayer?

nether/items.lua

@@ -11,13 +11,23 @@ local function add_more_nodes(name)
 		name = "nether_"..name
 	end
 	local data = minetest.registered_nodes[nd]
-	stairs.register_stair_and_slab(name, nd,
+	if stairsplus then
+		stairsplus:register_all(
+			"nether",
+			name,
+			nd,
+			data
+		)
+	else
+		stairs.register_stair_and_slab(
+			name, nd,
 			data.groups,
 			data.tiles,
 			data.description.." Stair",
 			data.description.." Slab",
 			data.sounds
 		)
+	end
 	if add_fence then
 		add_fence({fence_of = nd})
 	end