Don't set poller.fd twice in newFdPoller (#406)
Don't set poller.fd twice in newFdPoller (#406)

In newEmptyPoller when creating the poller using newEmptyPoller(fd), the
fd field of the poller instance is already set. There is no need to set
it again.
fsnotify/fsnotify,fsnotify/fsnotify,fsnotify/fsnotify