omnithread 2.5 NT resource leak

[Tristan Richardson]

> The NT omnithread library (2.5beta) appears to be missing the
> lines indicated below to release the thread's semaphore handle.
> 
> 
> > //
> > // Destructor for omni_thread.
> > //
> >
> > omni_thread::~omni_thread(void)
> > {
> >     DB(cerr << "destructor called for thread " << id() << endl);
> >     if (!CloseHandle(handle))
> >         throw omni_thread_fatal(GetLastError());
> > >>  if (!CloseHandle(cond_semaphore))             <<
> > >>      throw omni_thread_fatal(GetLastError());  <<
> > }
> >

Well spotted.  We'll fix our develop version so it makes it into the next
release.

Cheers

Tristan