Description of problem:

At least on some files gnumeric is producing LaTeX output
where some used macros, more precisely control sequences,
were previously undefined.

Version-Release number of selected component (if applicable):
gnumeric-1.2.13-6

How reproducible:
Some inputs

Steps to Reproduce:
1. Take an Excel file from an attachment to bug #137692
https://bugzilla.redhat.com/bugzilla/attachment.cgi?id=105981&action=view
and save as Velvia.xls

2. Load Velvia.xls into gnumeric and save as "LaTeX" file Velvia.tex.
Filter results

   tr -dc '[:print:]\n' < Velvia.tex > Velvia2.tex

or LaTeX will be quite unhappy.
    
3. Do 'latex Velvia2.tex' and watch
! Undefined control sequence.
\@nextchar ...cColJ +\gnumericColK +\gnumericColL 
                                                  +\gnumericColM 

and so on.  The problem is that \gnumericColL, \gnumericColM and
\gnumericColN are used but only \gnumericColA to \gnumericColK
are defined.

Expected results:
All of the above are defined in output before an attempt
to use these.