more safe peek list cleanup in openPeekInStreams
more safe peek list cleanup in openPeekInStreams

This might have fixed other missing song Py_decrefs.

etienne-gauvin/music-player-core,albertz/music-player-core,etienne-gauvin/music-player-core,albertz/music-player-core,albertz/music-player-core,etienne-gauvin/music-player-core