From 4e596096fadd4591bb4e6fbb202915f7bc00f326 Mon Sep 17 00:00:00 2001
From: sys4 <admin@sys4.fr>
Date: Mon, 7 Sep 2020 02:16:01 +0200
Subject: [PATCH] Fix LBM with dark_<color> blocks

---
 init.lua | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/init.lua b/init.lua
index e2bafa0..37b9beb 100644
--- a/init.lua
+++ b/init.lua
@@ -626,7 +626,9 @@ minetest.register_lbm({
 		colorclass == "micro" or colorclass == "slope" then
 			class = colorclass
 			local colorshape = string.sub(name, b+1)
-			local c,d = string.find(colorshape, "dark_") or 0,0
+			local c,d = string.find(colorshape, "dark_")
+			if not c then c = 0 end
+			if not d then d = 0 end
 			local colshapetemp = string.sub(colorshape, d+1)
 			c = string.find(colshapetemp, "_") or 0
 			shape = string.sub(colshapetemp, c)