bug in the mark of TAudioFileReader

[Kizzzy]

In StreamPlayer#initAudioInputStream, first get audioInputStream and second get audioFileFormat If the TAudioFileReader#m_bRereading is false, first get audioInputStream will set the mark of the InputSteam to a non-zero value,then second get audioFileFormat will throw UnsupportedAudioFileException, because the pos of the InputStream has been set to the mark.