glib/goption.c (unknown symbol)

[John Emmas <johne53 tiscali co uk>]

Hi - I just updated from git master (about half an hour ago) but MSVC 
gives me an 'undeclared identifier' error at line 368 of 
'glib/goption.c'.  Here's what the line looks like:-

      optind = 1;

I assumed (maybe?) it was a typo - but on reading the rest of that 
function, it's not really obvious what the line should have been. The 
relevant function is called 'g_option_context_new()'

Alternatively, 'optind' might be something in unistd.h (which also got 
#included as part of the same update).  But generally speaking elsewhere 
in glib, unistd.h only tends to get #included if 'G_OS_UNIX' is defined 
(which usually won't be the case when building with MSVC).

Whatever...  it's all a bit confusing so I thought I'd flag it up!!

John