🚀 go-pugleaf

Hi,

	In Emacs version 18.55, when I executed TeX-region, I got the
error message "Wrong type argument: stringp, nil".

	Apparently the source of the error is in TeX-start-shell,
where a nil is passed as the second argument to "make-shell", which
is supposed to be a string:

(defun TeX-start-shell ()
  (require 'shell)
  (save-excursion
    (set-buffer (make-shell "TeX-shell" nil nil "-v"))
    (setq TeX-shell-map (copy-keymap shell-mode-map))
    (TeX-define-common-keys TeX-shell-map)
    (use-local-map TeX-shell-map)
    (if (zerop (buffer-size))
	(sleep-for 1))))

	Alternatively, make-shell should be changed so that if the
second argument is nil, then replaces it by the default shell.

	Thanks you very much!

Wilson Ho