From: Artemy Tregubenko <me@arty.name>
Date: Thu, 9 Jan 2014 14:20:05 +0000 (+0100)
Subject: added hasOwnProperty check to avoid warnings
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=f6203bd5a8063a3af835603ce1959310f14f7f5e;p=UglifyJS.git

added hasOwnProperty check to avoid warnings
---

diff --git a/tools/node.js b/tools/node.js
index 4dfa9338..bef296ea 100644
--- a/tools/node.js
+++ b/tools/node.js
@@ -114,7 +114,9 @@ exports.minify = function(files, options) {
         });
         if (options.sourceMapIncludeSources) {
             for (var file in sourcesContent) {
-                options.source_map.get().setSourceContent(file, sourcesContent[file]);
+                if (sourcesContent.hasOwnProperty(file)) {
+                    options.source_map.get().setSourceContent(file, sourcesContent[file]);
+                }
             }
         }