Index: trunk/kernel/parser.php
===================================================================
diff -u -r568 -r592
--- trunk/kernel/parser.php	(.../parser.php)	(revision 568)
+++ trunk/kernel/parser.php	(.../parser.php)	(revision 592)
@@ -2901,7 +2901,7 @@
     else
         $ret = 0;    
                 
-    return $ret;
+    return !$ret ? 0 : $ret;
 }
 
 /*