get cue track when load m3u playlist

can't load it correct when save a playlist contian music track in cue sheet under xbmc. xbmc treated the whole flac/ape file as one song when load playlist now. and in fact it contian an album.
Youonly need to set m_lStartOffset/m_lStartPartNumber, m_lEndOffset.  You shouldn't need any of the other stuff (no property, no settitle/setloaded)