Added test for auto with concurrency but without callback.

Author: Ilya Shatokhin

test/test-async.js

@@ -426,7 +426,6 @@ exports['auto results'] = function(test){
     });
 };
 
-
 exports['auto empty object'] = function(test){
     async.auto({}, function(err){
         test.ok(err === null, err + " passed instead of 'null'");
@@ -461,6 +460,13 @@ exports['auto no callback'] = function(test){
     });
 };
 
+exports['auto concurrency no callback'] = function(test){
+    async.auto({
+        task1: function(callback){callback();},
+        task2: ['task1', function(callback){callback(); test.done();}]
+    }, 1);
+};
+
 exports['auto error should pass partial results'] = function(test) {
     async.auto({
         task1: function(callback){