sound_parse: check for EOF in object loop.
sound_parse: check for EOF in object loop.

Fixes very long delay with corrupt input.

ace20022/libbluray,ShiftMediaProject/libbluray,Azzuro/libbluray,ace20022/libbluray,ShiftMediaProject/libbluray,ShiftMediaProject/libbluray,Azzuro/libbluray,ace20022/libbluray,Azzuro/libbluray,Azzuro/libbluray,ace20022/libbluray,ShiftMediaProject/libbluray