* fhandler.h (fhandler_base_overlapped): Temporarily (?) make select_pipe_info

a friend until the fhandler_tty intertangling can be worked out.
* select.cc (select_pipe_info::add_watch_handle): Don't inspect the overlapped
event if we're not waiting for I/O.
(fhandler_tty_common::select_*): Change to standard function.  Don't do kludgy
fhandler_pipe coercion.

winsup/cygwin/fhandler.h

@@ -569,6 +569,8 @@ public:
   void set_overlapped (OVERLAPPED *ov) {overlapped = ov;}
   fhandler_base_overlapped (): io_pending (false), overlapped (NULL) {}
   bool has_ongoing_io ();
+  friend class select_pipe_info;	/* FIXME: At least correct the naming
+					   here */
 };
 
 class fhandler_pipe: public fhandler_base_overlapped