We have User::isAllowed() for that :)

diff --git a/includes/specials/SpecialExport.php b/includes/specials/SpecialExport.php
index 83d0bbf..04fd43b 100644 (file)
--- a/includes/specials/SpecialExport.php
+++ b/includes/specials/SpecialExport.php
@@ -175,8 +175,8 @@ class SpecialExport extends SpecialPage {
        
        private function userCanOverrideExportDepth() {
                global $wgUser;   
-               
-               return in_array( 'override-export-depth', $wgUser->getRights());
+
+               return $wgUser->isAllowed( 'override-export-depth' );
        }
        
        /**