[CM] snd & inf-snd.el: multiple lines

[Bill Schottstaedt]

Thanks very much!  There must be a way to do the same thing
as XtAppAddInput or g_io_add_watch_full in the no-gui case.
I'll add it to my TODO list.  It also should be possible in
inf-snd.el to recognize the no-gui case (*features* won't include
'gtk or 'motif, I think), so your work-around could be invoked
automatically.