Fixes visibility comparison.

Signed-off-by: Stéphane Jacob <sj@m4x.org>

diff --git a/classes/visibility.php b/classes/visibility.php
index dba6578..34036af 100644 (file)
--- a/classes/visibility.php
+++ b/classes/visibility.php
@@ -131,7 +131,7 @@ class Visibility
     {
         // self::$display_levels is order from least restrictive
         // to most restrictive.
-        return self::$display_levels[$a] >= self::$display_levels[$b];
+        return self::$display_levels[$level_a] >= self::$display_levels[$level_b];
     }
 
     /** Compare the visibility of two fields.