Follow-up r93527: $value can also be null when not set

diff --git a/includes/specials/SpecialComparePages.php b/includes/specials/SpecialComparePages.php
index 5531a6d..81fd92f 100644 (file)
--- a/includes/specials/SpecialComparePages.php
+++ b/includes/specials/SpecialComparePages.php
@@ -130,7 +130,7 @@ class SpecialComparePages extends SpecialPage {
        }
 
        public function checkExistingTitle( $value, $alldata ) {
-               if ( $value === '' ) {
+               if ( $value === '' || $value === null ) {
                        return true;
                }
                $title = Title::newFromText( $value );
@@ -144,7 +144,7 @@ class SpecialComparePages extends SpecialPage {
        }
 
        public function checkExistingRevision( $value, $alldata ) {
-               if ( $value === '' ) {
+               if ( $value === '' || $value === null ) {
                        return true;
                }
                $revision = Revision::newFromId( $value );