* fhandler.h (fhandler_tty_master::set_winsize): Declare new function.

* fhandler_console.cc (fhandler_console::send_winch_maybe): If appropriate,
call tty master function to handle screen size change.
* fhandler_tty.cc (fhandler_tty_master::set_winsize): New function.
(fhandler_tty_master::init): Call set_winsize to set initial screen size.

winsup/cygwin/fhandler.h

@@ -948,6 +948,7 @@ class fhandler_tty_master: public fhandler_pty_master
   fhandler_tty_master (int unit);
   int init (int);
   int init_console ();
+  void set_winsize (bool);
   void fixup_after_fork (HANDLE parent);
   void fixup_after_exec (HANDLE);
 };