patch: dirwatcher changes missed when renaming folders

Debugged a problem when renaming folders: ' numberOfBytesTransfered is bougus when renaming a folder, numberOfBytesTransfered is always 0, even if buffer contains valid changes, so we can only rely on the buffer, even if ReadDirectoryChanges docs states that if numberOfBytesTransfered is 0 the kernel buffer is over flooded... Had a look at, http://www.codeproject.com/KB/files/directorychangewatcher.aspx, they ignore numberOfBytesTransfered as well, only rely on the buffer.

Gunnar.