Bug#2878: oleo uses Pre-Depends

[Ian Jackson <ian@chiark.chu.cam.ac.uk>]

Package: oleo
Version: 1.6-5

 Package: oleo
 version: 1.6-5
 pre-depends: libc5 (>=5.2.18-1), xlib(>=3.1.2-4), ncurses3.0
 ...

Only base packages should use Pre-Depends.

Ian.