Fixed error code not being parsed correctly.

Author: fiznool

lib/transporters.js

@@ -82,7 +82,7 @@ DefaultTransporter.prototype.wrapCallback_ = function(opt_callback) {
  err = new Error(body.error.errors.map(
  function(err) { return err.message; }
  ).join('\n'));
- err.code = body.error.errors[0].code;
+ err.code = body.error.code;
  err.errors = body.error.errors;
 
  } else {