child_process: simplify send() result handling

PR-URL: #13459 Reviewed-By: Refael Ackermann <refack@gmail.com> Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>

Author: mscdex

lib/internal/child_process.js

@@ -645,16 +645,15 @@ function setupChannel(target, channel) {
  obj.postSend(handle, options, target);
  }
 
- req.oncomplete = function() {
- if (this.async === true)
+ if (req.async) {
+ req.oncomplete = function() {
  control.unref();
- if (typeof callback === 'function')
- callback(null);
- };
- if (req.async === true) {
+ if (typeof callback === 'function')
+ callback(null);
+ };
  control.ref();
- } else {
- process.nextTick(function() { req.oncomplete(); });
+ } else if (typeof callback === 'function') {
+ process.nextTick(callback, null);
  }
  } else {
  // Cleanup handle on error