Bug#92674: build-depends on obsolete package

[Ryan Murray <rmurray@cyberhqz.com>]

Package: pclock
Version: 0.13-3
Severity: serious

This package build-depends on xpm4g-dev, which is no longer a package in
the current unstable archive.  The functionality this packaged offered is
now provided by the xlibs-dev package.  Depending on xlib6g-dev is the same
as depending on xlibs-dev and libxaw-dev, so in all cases this build-depends
should simply be removed.

As this is a cannot build from source type of bug, the severity is serious.

Ryan