Description:
------------
I'm using RecursiveDirectoryIterator to scan directories.

File objects returned by this iterator seem to threat isDir and hasChildren as the same thing. That is isDir returns true only when item has children. 

This assumption is invalid and causes empty directories to be reported as files.


Reproduce code:
---------------
<?php
function scan(RecursiveDirectoryIterator $dir)
{
	foreach($dir as $file)
	{
		var_dump($file->isDir());
		if ($dir->hasChildren()) scan($dir->getChildren());
	}
}
scan(new RecursiveDirectoryIterator('/some/path/that/has/empty/dirs'));


Expected result:
----------------
isDir should not act as alias of hasChildren

Actual result:
--------------
empty directories have isFile()==true and isDir()==false