[emms-help] substr doesn't work on sequences (in XEmacs)

[Angus Lees]

In XEmacs 21.4 (at least), substr doesn't work on sequences, you have
to use `subseq'

;; s/substring/subseq/
(defun emms-playlist-add (seq &optional idx)
  "Add each track of the sequence SEQ to the current playlist.
Insert at IDX, which defaults to the end."
  (let ((idx (or idx (length emms-playlist))))
    (emms-playlist-set-playlist
     (vconcat (subseq emms-playlist 0 idx)
              (if emms-playlist-sort-added-tracks-p
                  (emms-playlist-sort-vector seq)
                seq)
              (subseq emms-playlist idx)))))


PS: it would be nice if emms-auto.el (or somewhere) also included
autoloads for a bunch of "constructed" functions, like the standard
emms-info-*, emms-source-* and emms-player-* definitions that come
with emms.

-- 
 - Gus