Merge branch 'master' into streams3

Author: James Halliday

index.js

@@ -181,11 +181,9 @@ Deps.prototype.resolve = function (id, parent, cb) {
 
 Deps.prototype.readFile = function (file, id, pkg) {
     var self = this;
-    var tr = through();
-
-    var inputSource = this.fileCache && this.fileCache[file];
-    if (inputSource) {
-        tr.push(inputSource);
+    if (xhas(this.fileCache, file)) {
+        var tr = through();
+        tr.push(this.fileCache[file]);
         tr.push(null);
         return tr;
     }

package.json

@@ -1,6 +1,6 @@
 {
   "name": "module-deps",
-  "version": "3.9.0",
+  "version": "3.9.1",
   "description": "walk the dependency graph to generate json output that can be fed into browser-pack",
   "main": "index.js",
   "bin": {