[VM] Preventing vm from downloading messages with IMAP

[Gian Uberto Lauri]

I started tinkering to prevent vm to download messages unless I really
open them.

I tried to change the value of vm-imap-max-message-size variable, but
I did not get the desired behaviour. What did I wrong?

I am uising vm version 8.1.1 on GNU Emacs 24.4.1
(x86_64-unknown-linux-gnu, GTK+ Version 2.24.10)

-- 
 /\           ___                                    Ubuntu: ancient
/___/\_|_|\_|__|___Gian Uberto Lauri_____               African word
  //--\| | \|  |   Integralista GNUslamico            meaning "I can
\/                 coltivatore diretto di software       not install
     già sistemista a tempo (altrui) perso...                Debian"

Warning: gnome-config-daemon considered more dangerous than GOTO