glib compilation problems when building from git master with MSVC

[John Emmas <john creativepost co uk>]

When trying to build glib (git master) I've hit a few compilation snags 
arising from commit #53bd6a359f (29th Sept 2017)

1) Firstly (in gstdio.c) the function:- '_g_win32_readlink_utf16_raw()' 
uses a value called "IO_REPARSE_TAG_SYMLINK".  This doesn't seem to be 
defined for MSVC - at least not in my version (VC8).

2) gstdio.c uses some other identifiers too - notably, 
'FILE_STANDARD_INFO' and 'FILE_NAME_NORMALIZED'.  These seem to be 
declared in winbase.h which should (in theory) be getting #included by 
windows.h.  However, MSVC reports them both as undeclared identifiers 
(even if I specifically #include winbase.h !!)

Is there some new #define needed which I maybe don''t know about ??

John