Fix link.

[SVN r12674]

index.htm

@@ -95,7 +95,7 @@ and added new compile-time
   <li><a href="libs/function/index.html">Function Library</a>: user may request that <code>boost::function</code> objects store a reference to a function object target instead of a copy, using <a href="libs/bind/ref.html"><code>ref</code></a>. Stateless objects are optimized so that they require no dynamic storage.</li>
   <li><a href="libs/math/quaternion/index.html">Quaternions</a>: added support for GCC 2.95.x.</a></li>
   <li><a href="libs/math/octonion/index.html">Octonions</a>: added support for GCC 2.95.x.</a></li>
-  <li><a href="libs/smart_ptr/index.html">Smart Pointers Library</a>: Peter Dimov contributed a new implementation that fixeds some bugs and adds some features.</li>
+  <li><a href="libs/smart_ptr/index.htm">Smart Pointers Library</a>: Peter Dimov contributed a new implementation that fixeds some bugs and adds some features.</li>
 
 </ul>
 <p>November 30, 2001 - Version 1.26.0</p>