LABEL is an identifier what is specidied by `elmo-progress-notify'.
If TOTAL is nil, the first `elmo-progress-notify' call must be
with a `:total' parameter.
-If optional parameter VAR is specified, it bind a progress counter object.
+If optional parameter VAR is specified, it is bound a progress counter object.
MESSAGE is a doing part of progress message."
(let ((label (nth 0 spec))
(total (nth 1 spec))