From 714bcc0711195f84818fb44b71e084669fb8231d Mon Sep 17 00:00:00 2001
From: Andy Wood <andy@groupzap.com>
Date: Tue, 13 May 2014 08:03:55 +0100
Subject: [PATCH] Guard against not having an input sourcemap.

---
 lib/sourcemap.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/sourcemap.js b/lib/sourcemap.js
index 403b4f4d..6e98e547 100644
--- a/lib/sourcemap.js
+++ b/lib/sourcemap.js
@@ -60,7 +60,7 @@ function SourceMap(options) {
     var orig_map = options.orig && new MOZ_SourceMap.SourceMapConsumer(options.orig);
 
     // Copy across inline sourcesContent, if any
-    if (options.orig.sourcesContent) {
+    if (options.orig && options.orig.sourcesContent) {
         var len = options.orig.sourcesContent.length;
         for (var i = 0; i < len; i++) {
             generator.setSourceContent(options.orig.sources[i], options.orig.sourcesContent[i]);