Overflow cygthreads (those which use simplestub) don't set notify_detached event which may cause timer_delete to hung

[Christopher Faylor]

On Thu, Aug 25, 2011 at 08:06:08PM +0100, Rafal Zwierz wrote:
>* cygthread.cc (cygthread::simplestub): Notify that the thread has
>detached also in freerange thread case.

Looks good.  I'll check this in.  Thanks.

cgf