as11: fix format for int64_t param in duration warning message
as11: fix format for int64_t param in duration warning message

kierank/bmxlib-bmx,xunchangguo/BMX,Limecraft/ebu-bmx,ebu/ebu-bmx,stuarthicks/bmx,kierank/bmxlib-bmx,Limecraft/ebu-bmx,ebu/ebu-bmx,Limecraft/ebu-bmx,stuarthicks/bmx,kierank/bmxlib-bmx,xunchangguo/BMX,xunchangguo/BMX,ebu/ebu-bmx,stuarthicks/bmx