Description: the stairs.register_slab api changed recently
Author: Julien Puydt
Forwarded: https://github.com/4Evergreen4/quartz/issues/6 (not really upstream...)

--- minetest-mod-quartz.orig/init.lua
+++ minetest-mod-quartz/init.lua
@@ -75,7 +75,6 @@
 stairs.register_slab("quartzstair", "quartz:pillar",
 		{cracky=3, oddly_breakable_by_hand=1},
 		{"quartz_pillar_top.png", "quartz_pillar_top.png", "quartz_pillar_side.png"},
-		"Quartz Pillar stair",
 		"Quartz Pillar slab",
 		default.node_sound_glass_defaults())