Fixed inconsistent return types
diff --git a/system/libraries/Session/drivers/Session_database_driver.php b/system/libraries/Session/drivers/Session_database_driver.php
index 0ec6e34..20cec00 100644
--- a/system/libraries/Session/drivers/Session_database_driver.php
+++ b/system/libraries/Session/drivers/Session_database_driver.php
@@ -252,7 +252,7 @@
 	 *
 	 * Releases locks
 	 *
-	 * @return	void
+	 * @return	bool
 	 */
 	public function close()
 	{