Replaced `==` with `===` and `!=` with `!==` in /system/helpers
diff --git a/system/helpers/download_helper.php b/system/helpers/download_helper.php
index 470b61e..9c390a7 100644
--- a/system/helpers/download_helper.php
+++ b/system/helpers/download_helper.php
@@ -51,7 +51,7 @@
 	 */
 	function force_download($filename = '', $data = '', $set_mime = FALSE)
 	{
-		if ($filename == '' OR $data == '')
+		if ($filename === '' OR $data === '')
 		{
 			return FALSE;
 		}