Add SB Curated (copied from the smartbugs repository).

dataset/access_control/wallet_04_confused_sign.sol

@@ -0,0 +1,42 @@
+/*
+ * @source: https://smartcontractsecurity.github.io/SWC-registry/docs/SWC-105#wallet-04-confused-signsol
+ * @author: -
+ * @vulnerable_at_lines: 30
+ */
+
+ pragma solidity ^0.4.24;
+
+ /* User can add pay in and withdraw Ether.
+    Unfortunatelty, the developer was drunk and used the wrong comparison operator in "withdraw()"
+    Anybody can withdraw arbitrary amounts of Ether :()
+ */
+
+ contract Wallet {
+     address creator;
+
+     mapping(address => uint256) balances;
+
+     constructor() public {
+         creator = msg.sender;
+     }
+
+     function deposit() public payable {
+         assert(balances[msg.sender] + msg.value > balances[msg.sender]);
+         balances[msg.sender] += msg.value;
+     }
+
+     function withdraw(uint256 amount) public {
+         // <yes> <report> ACCESS_CONTROL
+         require(amount >= balances[msg.sender]);
+         msg.sender.transfer(amount);
+         balances[msg.sender] -= amount;
+     }
+
+     // In an emergency the owner can migrate  allfunds to a different address.
+
+     function migrateTo(address to) public {
+         require(creator == msg.sender);
+         to.transfer(this.balance);
+     }
+
+ }