audio_thread: add warning about unexpected flags returned by poll()
audio_thread: add warning about unexpected flags returned by poll()

reuben/freshplayerplugin,grevutiu-gabriel/freshplayerplugin,Papapashu/freshplayerplugin,reuben/freshplayerplugin,reuben/freshplayerplugin,Papapashu/freshplayerplugin,Papapashu/freshplayerplugin,grevutiu-gabriel/freshplayerplugin