Hi,

I'm using desktop-save-mode and regularly open files via Tramp with a
method that asks for a password and that would eventually expire.  By
default 'desktop-files-not-to-save' is "\\(\\`/[^/:]*:\\|(ftp)\\'\\)" so
I expect that those remote buffer are not saved by desktop-save.

When such a remote buffer is opened (but not displayed nor used), Emacs
will keep asking me for this password and I find it annoying.

I try to track down this issue and found out that the call to
'desktop-buffer-info' on each buffer triggered this password prompt.

The following patch tries to solve this.