check for moreblocks before assuming stairsplus can be used :-)

init.lua

@@ -269,8 +269,8 @@ for _, shade in ipairs(coloredwood.greys) do
 	table.insert(coloredwood.old_static_nodes, "coloredwood:fence_"..shade)
 end
 
--- add all of the stairsplus nodes
-
+-- add all of the stairsplus nodes, if moreblocks is installed.
+if coloredwood.enable_stairsplus then
 	for _, shape in ipairs(circular_saw.names) do
 		local a = shape[1]
 		local b = shape[2]
@@ -292,6 +292,7 @@ for _, shape in ipairs(circular_saw.names) do
 			end
 		end
 	end
+end
 
 minetest.register_lbm({
 	name = "coloredwood:convert",