Fix copy/paste error

api/actions/savenote.php

@@ -24,7 +24,7 @@ if (!empty($VARS['id'])) {
 }
 
 if ($newnote && $SETTINGS['note_limit'] !== false && !getRequestUser()->hasPermission($SETTINGS['unlimited_permission'])) {
-    $notecount = $database->count("notes", ['ownerid' => $_SESSION['uid']]);
+    $notecount = $database->count("notes", ['ownerid' => getRequestUser()->getUID()]);
     if ($notecount >= $SETTINGS['note_limit']) {
         sendJsonResp($Strings->get("You've reached your quota limit and can't make new notes.", false), "ERROR");
     }