Add SB Curated (copied from the smartbugs repository).

dataset/access_control/unprotected0.sol

@@ -0,0 +1,39 @@
+/*
+ * @source: https://github.com/trailofbits/not-so-smart-contracts/blob/master/unprotected_function/Unprotected.sol
+ * @author: -
+ * @vulnerable_at_lines: 25
+ */
+
+ pragma solidity ^0.4.15;
+
+ contract Unprotected{
+     address private owner;
+
+     modifier onlyowner {
+         require(msg.sender==owner);
+         _;
+     }
+
+     function Unprotected()
+         public
+     {
+         owner = msg.sender;
+     }
+
+     // This function should be protected
+     // <yes> <report> ACCESS_CONTROL
+     function changeOwner(address _newOwner)
+         public
+     {
+        owner = _newOwner;
+     }
+
+    /*
+    function changeOwner_fixed(address _newOwner)
+         public
+         onlyowner
+     {
+        owner = _newOwner;
+     }
+     */
+ }