From 6588ef4cdbd5097de9fea534798b52f13b1faeb6 Mon Sep 17 00:00:00 2001
From: Sokomine <wegwerf@anarres.dyndns.org>
Date: Sun, 6 Jun 2021 00:18:01 +0200
Subject: [PATCH] fix crash when deleting non-existant trade

---
 trade_simple.lua | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/trade_simple.lua b/trade_simple.lua
index 2856cd2..0130780 100644
--- a/trade_simple.lua
+++ b/trade_simple.lua
@@ -387,6 +387,9 @@ yl_speak_up.input_add_trade_simple = function(player, formname, fields)
 		table.insert(yl_speak_up.npc_was_changed[ n_id ],
 			"Dialog "..d_id..": Trade "..tostring(trade_id).." deleted from option "..
 					tostring(o_id)..".")
+		if(not(dialog.trades)) then
+			dialog.trades = {}
+		end
 		-- delete the trade type result
 		if(trade_id) then
 			dialog.trades[ trade_id ] = nil