Added credit.

readme.html

@@ -935,8 +935,9 @@ their skills.  Special thanks go out to:</p>
   Leopard</li>
 
   <li>Riku Salminen, for the initial implementation of
-  <code>glfwShowWindow</code> and <code>glfwHideWindow</code>, and for making
-  the X11 event processing able to support multi-threaded rendering</li>
+  <code>glfwShowWindow</code> and <code>glfwHideWindow</code>, for the idea of
+  <code>glfwDefaultWindowHints</code> and for making the X11 event processing
+  able to support multi-threaded rendering</li>
 
   <li>Douglas C. Schmidt and Irfan Pyarali, for their excellent article
   <a href="http://www.cs.wustl.edu/~schmidt/win32-cv-1.html">Strategies for Implementing POSIX Condition Variables on Win32</a></li>