Bug#447559: chemtex is broken again

[Soeren Sonnenburg <bugreports@nn7.de>]

Package: context
Version: 2007.09.28-1
Severity: important
Tags: patch

This time a fix is to add
\input syst-gen.tex

to the beginning of

/usr/share/texmf/tex/context/base/ppchtex.tex

otherwise

all compiles fail with:

(/usr/share/texmf/tex/context/base/ppchtex.tex
loading        : Context Chemical Macro's / 1996.3.1
ppchtex        : using PiCTeX
! Missing { inserted.
<to be read again> 
                   \def 
l.661 \unexpanded\def
                     \complexstartchemical[#1]%

-- System Information:
Debian Release: lenny/sid
  APT prefers stable
  APT policy: (700, 'stable'), (650, 'testing'), (600, 'unstable'), (1, 'experimental')
Architecture: i386 (i686)

Kernel: Linux 2.6.23-sonne (SMP w/2 CPU cores; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages context depends on:
ii  lmodern                       1.010x-4   scalable PostScript and OpenType f
ii  ruby                          1.8.2-1    An interpreter of object-oriented 
ii  tex-common                    1.9        Common infrastructure for using an
ii  texlive-base                  2007-12    TeX Live: Essential programs and f
ii  texlive-base-bin              2007-14    TeX Live: Essential binaries
ii  texlive-metapost              2007-14    TeX Live: MetaPost (and Metafont) 

Versions of packages context recommends:
pn  luatex                        <none>     (no description available)

-- no debconf information