From 6df64ffe06aed0bdec70cd613a47e5d092510146 Mon Sep 17 00:00:00 2001
From: Feross Aboukhadijeh <feross@feross.org>
Date: Mon, 14 Mar 2016 19:16:00 -0700
Subject: [PATCH] Fixes for PR #126

---
 lib/client/http-tracker.js      | 2 +-
 lib/client/udp-tracker.js       | 2 +-
 lib/client/websocket-tracker.js | 9 +++++----
 3 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/lib/client/http-tracker.js b/lib/client/http-tracker.js
index ec10cc4..282c60a 100644
--- a/lib/client/http-tracker.js
+++ b/lib/client/http-tracker.js
@@ -74,7 +74,7 @@ HTTPTracker.prototype.scrape = function (opts) {
 
 HTTPTracker.prototype.destroy = function (cb) {
   var self = this
-  if (self.destroyed) return cb && cb()
+  if (self.destroyed) return cb(null)
   self.destroyed = true
   clearInterval(self.interval)
 
diff --git a/lib/client/udp-tracker.js b/lib/client/udp-tracker.js
index 8aec7e1..07d6c35 100644
--- a/lib/client/udp-tracker.js
+++ b/lib/client/udp-tracker.js
@@ -47,7 +47,7 @@ UDPTracker.prototype.scrape = function (opts) {
 
 UDPTracker.prototype.destroy = function (cb) {
   var self = this
-  if (self.destroyed) return cb && cb()
+  if (self.destroyed) return cb(null)
   self.destroyed = true
   clearInterval(self.interval)
 
diff --git a/lib/client/websocket-tracker.js b/lib/client/websocket-tracker.js
index df73062..d85a5ba 100644
--- a/lib/client/websocket-tracker.js
+++ b/lib/client/websocket-tracker.js
@@ -64,9 +64,10 @@ WebSocketTracker.prototype.scrape = function (opts) {
   self._onSocketError(new Error('scrape not supported ' + self.announceUrl))
 }
 
-WebSocketTracker.prototype.destroy = function (onclose) {
+WebSocketTracker.prototype.destroy = function (cb) {
   var self = this
-  if (self.destroyed) return onclose && onclose()
+  if (!cb) cb = noop
+  if (self.destroyed) return cb(null)
   self.destroyed = true
   clearInterval(self.interval)
 
@@ -84,9 +85,9 @@ WebSocketTracker.prototype.destroy = function (onclose) {
 
   self.socket.on('error', noop) // ignore all future errors
   try {
-    self.socket.destroy(onclose)
+    self.socket.destroy(cb)
   } catch (err) {
-    if (onclose) onclose()
+    cb(null)
   }
 
   self.socket = null