This came from SYS;COLD but is not used there, and contrary to the
comment below, it's not used in SYS2;PROCES either. 

;;; Call this when the state of a process may have changed.
;;; In the cold-load because called by process stuff, loaded before window stuff.
(DEFUN TV::WHO-LINE-PROCESS-CHANGE (PROC)
  (AND (FBOUNDP 'TV::WHO-LINE-RUN-STATE-UPDATE) (EQ PROC TV::LAST-WHO-LINE-PROCESS)
       (TV::WHO-LINE-RUN-STATE-UPDATE)))