Fix an erroneous variable name

Close #3356
Close #3367
diff --git a/system/helpers/smiley_helper.php b/system/helpers/smiley_helper.php
index a529c45..20f3d41 100644
--- a/system/helpers/smiley_helper.php
+++ b/system/helpers/smiley_helper.php
@@ -228,7 +228,7 @@
 	{
 		static $_smileys;
 
-		if ( ! is_array($smileys))
+		if ( ! is_array($_smileys))
 		{
 			if (file_exists(APPPATH.'config/smileys.php'))
 			{