fix for previews in trashbin app

apps/files_trashbin/templates/part.list.php

@@ -27,7 +27,7 @@
 		<?php if($file['type'] == 'dir'): ?>
 			style="background-image:url(<?php print_unescaped(OCP\mimetype_icon('dir')); ?>)"
 		<?php else: ?>
-			style="background-image:url(<?php print_unescaped(OCA\Files_Trashbin\Trashbin::preview_icon($file['name'].'.d'.$file['timestamp'])); ?>)"
+			style="background-image:url(<?php print_unescaped(OCA\Files_Trashbin\Trashbin::preview_icon(!$_['dirlisting'] ? ($file['name'].'.d'.$file['timestamp']) : ($file['directory'].'/'.$file['name']))); ?>)"
 		<?php endif; ?>
 			>
 		<?php if(!isset($_['readonly']) || !$_['readonly']): ?><input type="checkbox" /><?php endif; ?>