Bug#354339: Always tries to retrieve a preseed file even for not preseeded installs

[Christian Perrier <bubulle@debian.org>]

Package: preseed
Severity: grave
Justification: renders package unusable

It seems that preseed always tries to retrieve a preseed file...even for not
preseeded installs.

I found this while running a standard install with the sid_d-i netinst of
20060224.

-- System Information:
Debian Release: testing/unstable
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (500, 'stable')
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.15-1-686
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8)