From 08d1543238b1d76fef9bb118117f265ba54cc4ed Mon Sep 17 00:00:00 2001
From: Wuzzy <Wuzzy2@mail.ru>
Date: Thu, 24 Oct 2019 19:39:49 +0200
Subject: [PATCH] Don't print warning when trying to craft nothing

---
 mods/crafting/api.lua | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/mods/crafting/api.lua b/mods/crafting/api.lua
index 247fad5..a7eb1f1 100644
--- a/mods/crafting/api.lua
+++ b/mods/crafting/api.lua
@@ -152,6 +152,9 @@ end
 function crafting.craft(player, wanted, wanted_count, output, items)
    -- `output` can be any ItemStack value
    -- Duplicate items in `items` should work correctly
+   if wanted:is_empty() then
+      return nil
+   end
 
    local craftdef = crafting.registered_crafts[wanted:to_string()]