Ftruncate check

[Steven Edwards]

> Well I don't think that
> 
> #define ftruncate(fd, size)
> 
> is a good replacement for ftruncate <g>
> 
> You'll either have to implement ftruncate in mingw, or change 
> makedep to not require it. But making it silently broken is 
> not a good idea.
 
Ok. I got that from
http://developer.gnome.org/doc/API/glib/glib-windows-compatability-funct
ions.html
and it works under mingw but I will try to find a better way of doing it
or 
just fix makedep.

Thanks
Steven

"Every revolution was once a thought in one man's mind"
- Ralph Waldo Emerson