CDAudioManager is still the delegate of AVAudioSession after CDAudioManager end/dealloc

# What steps will reproduce the problem?

1. Startup Cocos2d and CDAudioManager. 
2. Shutdown CDAudioManager ([CDAudioManager end];) or [SimpleAudioEngine end].
3. Play video/audio via an AVPlayer.
4. When video stops playing an audio interruption will occur and AVSessionAudio 
will attempt to send a message to its delegate which is still the 
CDAudioManager and seeing as it is no longer around (dealloced in step 2) the 
app will crash.
5. Yes my class playing the video via AVPlayer SHOULD have changed 
AVSessionAudio delegate to itself (my bad) however I still think it makes sense 
for CDAudioManager to unset this when it gets dealloced for safety sake.
6. See patch bellow.

# What is the expected output? What do you see instead?
Not to crash.

# What cocos2d version / SVN revision are you using ?
0.95.5

# What iPhoneSDK are you using ?
4.2.2

# Debug or Release ?
Debug/Release

# Does this happens on device ? or on the simulator ? or on both ?
Device

Please provide any additional information below.

I've attached a patch fixing this issue. In the CDAudioManager's dealloc it 
should set the AVAudioSession delegate to nil to prevent AVAudioSession from 
potentially sending a message to destroyed CDAudioManager's.

Original issue reported on code.google.com by colinmcc...@gmail.com on 9 Feb 2011 at 12:12

Attachments:

patch.diff

DNESS / cocos2d-iphone

CDAudioManager is still the delegate of AVAudioSession after CDAudioManager end/dealloc #1108