Bug#575073: lintian: override for diff in squeeze

[Santiago Vila <sanvila@unex.es>]

Package: lintian
Version: 2.3.4
Severity: wishlist

The diff package in lenny is now called diffutils in squeeze. To ease
transition, diff is now dummy and it has a "Pre-Depends: diffutils",
which lintian flags this way:

E: diff: depends-on-essential-package-without-using-version pre-depends: diffutils

However, any version of diffutils is ok, as the package name is new,
so this is really a false positive. Obviously, whenever an essential
package is renamed, this type of dependency (which should really be a
Pre-depends) should be ok.

Thanks.