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