Bug#556738: grub-pc: Displays "being upgraded" dialog during new installations from D-I

[Frans Pop]

Package: grub-pc
Version: 1.97~beta3-1
Severity: important
Tags: d-i

During a new installation grub-pc incorrectly displays the dialog that it is
being upgraded and asks to select which device to run grub-install on.

Apparently the test whether the package is being newly installed or upgraded
is broken.

I've verified that this also happens with the version currently in unstable
(1.97+20091115-1).

-- System Information:
Debian Release: squeeze/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.32-rc7 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash