libglib - Newly introduced build issue with MSVC8

[John Emmas <johne53 tiscali co uk>]

This morning I updated libglib from git master and I noticed a number of 
newly added sources (including 'gio/gliststore.h').  By whatever 
mechanism, that header file now gets #included when I build 
'gio/gwin32outputstream.c'.  Line 36 of the header file looks like this:-

      G_DECLARE_FINAL_TYPE(GListStore, g_list_store, G, LIST_STORE, 
GObject)

MSVC8 is giving me a compiler error when I try to compile 
'gio/gwin32outputstream.c'.  The error occurs at the above line where 
MSVC tells me:-

      error C2091: function returns function

(there are extra errors too - but that's the first one in the list).  
Although I've been programming with MSVC8 for 10 years I've never 
encountered that error message before (so it might take some time figure 
out what's wrong).  I just wondered if anyone could hazard a guess at 
what the problem might be?  Thanks.

John