QFileSystemWatcher::fileChanged()

With QFileSystemWatcher on Linux, the signal fileChanged() is emitted multiple times when writing a big file. It looks like the fileChanged() signal is triggered each time a flush() is done on the watched file. It would be more convenient if the signal was only emitted when a close() is done on the watched file.

The bug appears with the inotify and dnotify backends but more frequently with inotify.

Reproducible since Qt 4.5.1 at least.