Fix typo in saveWikiText that could lead to wrong changelog entries

This fixes saving the actually saved timestamp for deleted revisions in
the change log. Before this, the change log got 0  as timestamp and
therefore used the current time - which might be wrong if the current
second changed in between touching the page and adding the entry to the
changelog.

inc/common.php

@@ -1324,7 +1324,7 @@ function saveWikiText($id, $text, $summary, $minor = false) {
         // pre-save deleted revision
         @touch($svdta['file']);
         clearstatcache();
-        $data['newRevision'] = saveOldRevision($id);
+        $svdta['newRevision'] = saveOldRevision($id);
         // remove empty file
         @unlink($svdta['file']);
         $filesize_new = 0;