net: don't create unnecessary closure

Pass arguments to fireErrorCallbacks() explicitly.  Saves allocation
an unnecessary closure context.

PR-URL: #12342
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

lib/net.js

@@ -476,7 +476,7 @@ Socket.prototype.destroySoon = function() {
 Socket.prototype._destroy = function(exception, cb) {
   debug('destroy');
 
-  function fireErrorCallbacks(self) {
+  function fireErrorCallbacks(self, exception, cb) {
     if (cb) cb(exception);
     if (exception && !self._writableState.errorEmitted) {
       process.nextTick(emitErrorNT, self, exception);
@@ -486,7 +486,7 @@ Socket.prototype._destroy = function(exception, cb) {
 
   if (this.destroyed) {
     debug('already destroyed, fire error callbacks');
-    fireErrorCallbacks(this);
+    fireErrorCallbacks(this, exception, cb);
     return;
   }
 
@@ -518,7 +518,7 @@ Socket.prototype._destroy = function(exception, cb) {
   // to make it re-entrance safe in case Socket.prototype.destroy()
   // is called within callbacks
   this.destroyed = true;
-  fireErrorCallbacks(this);
+  fireErrorCallbacks(this, exception, cb);
 
   if (this._server) {
     COUNTER_NET_SERVER_CONNECTION_CLOSE(this);