From f7cfa0232f3ae7285a60ef230150f540152ec2c2 Mon Sep 17 00:00:00 2001
From: Novacat <35587478+Novacat@users.noreply.github.com>
Date: Mon, 7 Dec 2020 22:34:49 -0500
Subject: [PATCH] Merge pull request #9426 from VOREStation/upstream-merge-7774

[MIRROR] Prevents infinite money
---
 code/modules/economy/cash_register.dm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/code/modules/economy/cash_register.dm b/code/modules/economy/cash_register.dm
index 1e065eb079..8184229c8b 100644
--- a/code/modules/economy/cash_register.dm
+++ b/code/modules/economy/cash_register.dm
@@ -122,7 +122,7 @@
 				transaction_purpose = t_purpose
 				item_list += t_purpose
 				var/t_amount = round(input("Enter price", "New price") as num)
-				if (!t_amount || !Adjacent(usr)) return
+				if (!t_amount || !Adjacent(usr) || t_amount < 0) return
 				transaction_amount += t_amount
 				price_list += t_amount
 				playsound(src, 'sound/machines/twobeep.ogg', 25)