DirectSound: avoid double call to release function

If Start() failed, IDirectSound_Release() was called twice.

Signed-off-by: Rémi Denis-Courmont <remi@remlab.net> with changes

modules/audio_output/directsound.c

@@ -772,10 +772,7 @@ static HRESULT StreamStart( aout_stream_t *s,
 
     hr = Start( VLC_OBJECT(s), sys, fmt );
     if( FAILED(hr) )
-    {
-        IDirectSound_Release( sys->p_dsobject );
         goto error;
-    }
 
     s->sys = sys;
     s->time_get = StreamTimeGet;