fixed DocBlock typo for unset_userdata()
diff --git a/system/libraries/Session.php b/system/libraries/Session.php
index 8045017..a0fe562 100644
--- a/system/libraries/Session.php
+++ b/system/libraries/Session.php
@@ -436,7 +436,8 @@
 	/**

 	 * Delete a session variable from the "userdata" array

 	 *

-	 * @access	array

+	 * @access	public

+	 * @param	array

 	 * @return	void

 	 */		

 	function unset_userdata($newdata = array())