fix wrong method name

Signed-off-by: Morris Jobke <hey@morrisjobke.de>

index.php

@@ -50,7 +50,7 @@ try {
 	OC_Template::printErrorPage($ex->getMessage(), $ex->getHint());
 } catch (\OC\User\LoginException $ex) {
 	OC_Response::setStatus(OC_Response::STATUS_FORBIDDEN);
-	OC_Template::printErrorPage($ex->getMessage(), $ex->getHint());
+	OC_Template::printErrorPage($ex->getMessage(), $ex->getMessage());
 } catch (Exception $ex) {
 	\OC::$server->getLogger()->logException($ex, array('app' => 'index'));