From f008b5a7cb34ad09cc3267ded8d0d3cb6dbe3d34 Mon Sep 17 00:00:00 2001
From: Alex Chronopoulos <achronop@gmail.com>
Date: Thu, 21 Apr 2016 21:03:45 +0300
Subject: [PATCH] Allow NULL callback for deregister

---
 src/cubeb.c           | 2 +-
 src/cubeb_audiounit.c | 6 ++++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/cubeb.c b/src/cubeb.c
index 266b41e..9b5ba02 100644
--- a/src/cubeb.c
+++ b/src/cubeb.c
@@ -384,7 +384,7 @@ int cubeb_stream_device_destroy(cubeb_stream * stream,
 int cubeb_stream_register_device_changed_callback(cubeb_stream * stream,
                                                   cubeb_device_changed_callback device_changed_callback)
 {
-  if (!stream || !device_changed_callback) {
+  if (!stream) {
     return CUBEB_ERROR_INVALID_PARAMETER;
   }
 
diff --git a/src/cubeb_audiounit.c b/src/cubeb_audiounit.c
index e8c468d..4f8b98e 100644
--- a/src/cubeb_audiounit.c
+++ b/src/cubeb_audiounit.c
@@ -479,8 +479,10 @@ audiounit_add_listener(cubeb_stream * stm, AudioDeviceID id, AudioObjectProperty
 }
 
 OSStatus
-audiounit_remove_listener(cubeb_stream * stm, AudioDeviceID id, AudioObjectPropertySelector selector,
-    AudioObjectPropertyScope scope, AudioObjectPropertyListenerProc listener)
+audiounit_remove_listener(cubeb_stream * stm, AudioDeviceID id,
+                          AudioObjectPropertySelector selector,
+                          AudioObjectPropertyScope scope,
+                          AudioObjectPropertyListenerProc listener)
 {
   AudioObjectPropertyAddress address = {
       selector,