fix the breadcrumb

apps/files/index.php

@@ -74,11 +74,11 @@ foreach( explode( '/', $dir ) as $i ){
 // make breadcrumb und filelist markup
 $list = new OCP\Template( 'files', 'part.list', '' );
 $list->assign( 'files', $files );
-$list->assign( 'baseURL', OCP\Util::linkTo('files', 'index.php').'?dir=');
+$list->assign( 'baseURL', OCP\Util::linkTo('files', 'index.php').'&dir=');
 $list->assign( 'downloadURL', OCP\Util::linkTo('files', 'download.php').'?file=');
 $breadcrumbNav = new OCP\Template( 'files', 'part.breadcrumb', '' );
 $breadcrumbNav->assign( 'breadcrumb', $breadcrumb );
-$breadcrumbNav->assign( 'baseURL', OCP\Util::linkTo('files', 'index.php').'?dir=');
+$breadcrumbNav->assign( 'baseURL', OCP\Util::linkTo('files', 'index.php').'&dir=');
 
 $upload_max_filesize = OCP\Util::computerFileSize(ini_get('upload_max_filesize'));
 $post_max_size = OCP\Util::computerFileSize(ini_get('post_max_size'));