Replaced `==` with `===` and `!=` with `!==` in /system/libraries
diff --git a/system/libraries/Cache/drivers/Cache_file.php b/system/libraries/Cache/drivers/Cache_file.php
index f0eb8bd..ce2c2b1 100644
--- a/system/libraries/Cache/drivers/Cache_file.php
+++ b/system/libraries/Cache/drivers/Cache_file.php
@@ -53,7 +53,7 @@
 		$CI =& get_instance();
 		$CI->load->helper('file');
 		$path = $CI->config->item('cache_path');
-		$this->_cache_path = ($path == '') ? APPPATH.'cache/' : $path;
+		$this->_cache_path = ($path === '') ? APPPATH.'cache/' : $path;
 	}
 
 	// ------------------------------------------------------------------------