To support playing async sounds on the stack on Mac, do not delete the wxSoundData when its wxSound object is destroyed if it's in the queue of sounds to be played. Instead, mark it to be deleted and delete it after it has played.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@63023 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/osx/sound.h

@@ -30,6 +30,9 @@ public :
     virtual void Stop();
     // can be called by a timer for repeated tasks during playback
     virtual void SoundTask();
+    // mark this to be deleted
+    virtual void MarkForDeletion();
+    virtual bool IsMarkedForDeletion() const { return m_markedForDeletion; }
     
     // does the true work of stopping and cleaning up
     virtual void DoStop() = 0;
@@ -38,6 +41,7 @@ protected :
     
     unsigned int m_flags;
     wxSoundTimer* m_pTimer;
+    bool m_markedForDeletion;
 } ;
 
 class WXDLLIMPEXP_ADV wxSound : public wxSoundBase