* contrib/hbwin/win_os.prg
* Reverted 2010-10-22 19:08 UTC+0200
Turns out it was alright without the fix, as hb_osIsWinVista()
returns .T. also for upper versions (win7) by design, so it was not
necessary to change it to win_osIsVistaOrUpper() hbwin specific call.
Please double check it though, maybe I'm just too tired.