From f8399eaaa62e780691023d1d5352468848eaa66d Mon Sep 17 00:00:00 2001
From: ansuz <ansuz@transitiontech.ca>
Date: Thu, 8 Feb 2018 11:08:10 +0100
Subject: [PATCH] avoid concatenating 'undefined' in drive interface

---
 www/drive/inner.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/www/drive/inner.js b/www/drive/inner.js
index 11d96df42..be4909415 100644
--- a/www/drive/inner.js
+++ b/www/drive/inner.js
@@ -2673,11 +2673,14 @@ define([
             var data = JSON.parse(JSON.stringify(filesOp.getFileData(el)));
             if (!data || !data.href) { return void cb('INVALID_FILE'); }
             data.href = base + data.href;
+
+            var roUrl;
             if (ro) {
                 data.roHref = data.href;
                 delete data.href;
             } else {
-                data.roHref = base + getReadOnlyUrl(el);
+                roUrl = getReadOnlyUrl(el);
+                if (roUrl) { data.roHref = base + roUrl; }
             }
 
             UIElements.getProperties(common, data, cb);