Fix the poll() loop (ret == 0 means that a timeout expired, so it must be handled)
Fix the poll() loop (ret == 0 means that a timeout expired, so it must be
handled)


git-svn-id: a4d7c1866f8397a4106e0b57fc4fbf792bbdaaaf@8711 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

prajnashi/ffmpeg,prajnashi/ffmpeg,prajnashi/ffmpeg,prajnashi/ffmpeg