fix bug in async api test

Author: nfriedly

test/integration/test.speech_to_text.js

@@ -387,13 +387,13 @@ describe('speech_to_text_integration', function() {
 
     const deleteAfterRecognitionCompleted = (jobId, done) => {
       speech_to_text.getRecognitionJob({ id: jobId }, (err, res) => {
+        if (err) {
+          return done(err);
+        }
         if (res.status !== 'completed') {
           setTimeout(deleteAfterRecognitionCompleted.bind(null, jobId, done), 300);
         } else {
-          speech_to_text.deleteRecognitionJob({ id: res.id }, (err, res) => {
-            assert.ifError(err);
-            done();
-          });
+          speech_to_text.deleteRecognitionJob({ id: res.id }, done);
         }
       });
     };