Bug#64177: tetex-bin: xdvi does not accept command-line options

[Denis Barbier <barbier@imacs.polytechnique.fr>]

Package: tetex-bin
Version: 1.0.6-6
Severity: normal

We use a modified version of the xdvi script to display compressed DVI
files. Unfortunately this script is broken in that command-line options
are unavailable.

Solution 1: as texdoc can display compressed files, we may restore
  original xdvi script.

Solution 2: replace the line
      filename=${1+"$@"}
  so that filename is set to the last argument and not the first one.
  If this solution is retained, please fix #62813 too.

Denis