Merge pull request #6088 from Heroman3003/infinite-cash-no

Fixes money duping bug

code/modules/economy/cash.dm

@@ -78,6 +78,8 @@
 
 /obj/item/weapon/spacecash/attack_self()
 	var/amount = input(usr, "How many Thalers do you want to take? (0 to [src.worth])", "Take Money", 20) as num
+	if(!src || QDELETED(src))
+		return
 	amount = round(CLAMP(amount, 0, src.worth))
 
 	if(!amount)