Make `tty-display-color-p' follow its doc string. (Reported by Dan Nicolaescu.)

Make `tty-display-color-p' follow its doc string.  (Reported by Dan Nicolaescu.)

* lisp/vc.el (vc-annotate-color-map): Undo previous change.

* src/dispnew.c (Fsend_string_to_terminal): Update call to `get_tty_terminal'.

* src/term.c (Fsuspend_tty, Fresume_tty): Update call to `get_tty_terminal'.
  (get_tty_terminal): Add throw parameter.
  (Ftty_display_color_p, Ftty_display_color_cells): Don't throw errors on
  X frames.

* src/dispextern.h (get_tty_terminal): Update prototype.

git-archimport-id: lorentey@elte.hu--2004/emacs--multi-tty--0--patch-552