From 7a8b8d19df7c7e38434b18560734b5d2bc1ea84b Mon Sep 17 00:00:00 2001
From: Jean-Patrick Guerrero <jeanpatrick.guerrero@gmail.com>
Date: Sun, 15 Sep 2019 22:39:08 +0200
Subject: [PATCH] Fix possible nil crash

---
 init.lua | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/init.lua b/init.lua
index e6bd97c..6900c80 100644
--- a/init.lua
+++ b/init.lua
@@ -630,7 +630,7 @@ local function get_recipe_fs(data, fs)
 			for j = 1, #replacements do
 				local replacement = replacements[j]
 				if replacement[1] == item then
-					label = label .. "\nR"
+					label = "\nR"
 					replace = replacement[2]
 				end
 			end
@@ -638,7 +638,7 @@ local function get_recipe_fs(data, fs)
 
 		fs[#fs + 1] = fmt(FMT.item_image_button,
 			X, Y + (sfinv_only and 0.7 or 0),
-			btn_size, btn_size, item, clean_name(item), ESC(label))
+			btn_size, btn_size, item, clean_name(item), ESC(label) or "")
 
 		local burntime = fuel_cache[item] and fuel_cache[item].burntime