cleanup mi error message handling

[Nick Roberts]

 > > Other errors like:
 > >
 > > (gdb)
 > > -interpreter-exec
 > > ^error,msg="mi_cmd_interpreter_exec: Usage: -interpreter-exec interp
 > > command" (gdb)
 > >
 > > would be due to a frontend error, so I think it would be probably be best
 > > to display them elsewhare, e.g., status bar.
 > >
 > 
 > I think the screen should flash and beep three times, and an email
 > should be automatically sent the the frontend author :-)  Seriously,
 > the status bar doesn't feel right for this.  This is not status.

Please don't take the status bar example too literally, it was just the first
place I thought of, and is not the focus of my message.

To get a meaningful report probably requires full logging of all the
transactions anyway, which is what I do for Emacs.

In any case I've already surrendered on this issue.

Please redirect any frontend errors using Gdb in Emacs reported on this list to
emacs-devel ;-)

Thanks.

-- 
Nick                                           http://www.inet.net.nz/~nickrob