http://bugs.winehq.org/show_bug.cgi?id=24332
--- Comment #7 from Jerome Leclanche adys.wh@gmail.com 2010-09-10 12:41:33 CDT --- (In reply to comment #5)
The ERROR_INSUFFICIENT_BUFFER should be handled by LCIDToLocaleName() already, MSDN specifies that case for LCIDToLocaleName() as well.
Sounds good. You should send it to wine-patches@winehq.org.