wn_titla -- title window with attribute

        USAGE

          wn_titla(wn,title,atrib)
          WINDOWPTR wn;
          char *title;
          int atrib;

                wn    - window handle
                title - string pointer to title
                atrib - attribute to use for text

          The title is displayed on the top border of the window using
          the attribute specified by atrib.  The cursor is positioned off
          the screen after the title is written.

        RETURNS

          TRUE if all is well, NULL if the title is to large to fit on
          the top border or error.

        CAUTIONS

          The window "wn" automatically becomes the top window tile upon
          return.