avoid warning for undefined success and failure functions #162

Author: ehennum

lib/mlrest.js

@@ -1568,7 +1568,11 @@ function operationResultPromise(fullfilled, rejected) {
     resolvedPromise(operation, resolve);
   });
 
-  return promise.then(fullfilled, rejected);
+  switch(arguments.length) {
+  case 0:  return promise.then();
+  case 1:  return promise.then(fullfilled);
+  default: return promise.then(fullfilled, rejected);
+  }
 }
 function operationResultStream() {
   var operation = this;