New helper function on Win32, returns the root of the drive (or possibly

New helper function on Win32, returns the root of the drive (or possibly

2005-06-08  Tor Lillqvist  <tml@novell.com>

	* glib/gutils.c (get_windows_directory_root): New helper function
	on Win32, returns the root of the drive (or possibly share) where
	the Windows directory is. (In the case of Terminal Server sessions
	the Windows directory is a per-user folder.)
	(g_get_any_init): Use get_windows_directory_root() as last resort
	for both temp directory and home directory. g_get_home_dir() now
	never returns NULL on Win32. Don't look at HOMEDRIVE and
	HOMEPATH. HOME, USERPROFILE, CSIDL_PROFILE and Windows directory
	drive root should be enough.