Polishing Form helper
diff --git a/system/helpers/form_helper.php b/system/helpers/form_helper.php
index 5ba5b55..146c0f5 100644
--- a/system/helpers/form_helper.php
+++ b/system/helpers/form_helper.php
@@ -931,6 +931,11 @@
 	 */
 	function _attributes_to_string($attributes)
 	{
+		if (empty($attributes))
+		{
+			return '';
+		}
+
 		if (is_object($attributes))
 		{
 			$attributes = (array) $attributes;
@@ -950,7 +955,7 @@
 
 		if (is_string($attributes))
 		{
-			return ($attributes === '' ? '' : ' '.$attributes);
+			return ' '.$attributes;
 		}
 
 		return FALSE;