Fix #329 where the file caching driver referenced the incorrect cache directory.
diff --git a/system/libraries/Cache/drivers/Cache_file.php b/system/libraries/Cache/drivers/Cache_file.php
index 3ed357f..86d1a3b 100644
--- a/system/libraries/Cache/drivers/Cache_file.php
+++ b/system/libraries/Cache/drivers/Cache_file.php
@@ -39,7 +39,7 @@
 		
 		$path = $CI->config->item('cache_path');
 	
-		$this->_cache_path = ($path == '') ? BASEPATH.'cache/' : $path;
+		$this->_cache_path = ($path == '') ? APPPATH.'cache/' : $path;
 	}
 
 	// ------------------------------------------------------------------------