make _ci_autoloader() protected so it can be properly extended.
diff --git a/system/core/Loader.php b/system/core/Loader.php
index 452dc0b..de0fc06 100755
--- a/system/core/Loader.php
+++ b/system/core/Loader.php
@@ -1106,7 +1106,7 @@
 	 * @param	array
 	 * @return	void
 	 */
-	private function _ci_autoloader()
+	protected function _ci_autoloader()
 	{
 		if (defined('ENVIRONMENT') AND file_exists(APPPATH.'config/'.ENVIRONMENT.'/autoload.php'))
 		{