Fix crashes in xdialog_show (and other places) with xterm-mouse-mode.

Fix crashes in xdialog_show (and other places) with xterm-mouse-mode.

* src/dispextern.h (get_tty_device): Declare.

* src/dispnew.c (Fsend_string_to_terminal): Add optional TERMINAL parameter.

* src/fns.c (Fy_or_n_p, Fyes_or_no_p): Don't try to open an X dialog on
  tty terminals.

* src/term.c (get_tty_device): Remove static qualifier.

* src/xmenu.c (create_and_show_dialog, create_and_show_popup_menu)
  (free_frame_menubar, mouse_position_for_popup, set_frame_menubar)
  (update_frame_menubar, x_activate_menubar, xdialog_show, xmenu_show):
  Abort when given a non-X frame.

* src/xmenu.c (Fx_popup_menu, Fx_popup_dialog): Throw an error when run
  on a non-X frame.

git-archimport-id: lorentey@elte.hu--2004/emacs--multi-tty--0--patch-410