Bug#148655: dex-mode selection doesn't provide 1400x1050 resolution

[Juliusz Chroboczek <jch@pps.jussieu.fr>]

Note by the way that two default modelines for 1400x1050 have been
included in XFree86 4.2.0 (after Debian 3.0).  The list of default X
server modelines is in hw/xfree86/common/xf86DefModes.c, and
configuration tools could probably link against this file.

                                        Juliusz