Use an errorlevel to indicate test failure in Lua based scripts


git-svn-id: http://www.latex-project.org/svnroot/experimental/trunk@4774 de43f980-851b-0410-b2f7-c40aca1f87e0
Save a couple of lines

As we now use an errorlevel, just return it whatever it is.


git-svn-id: http://www.latex-project.org/svnroot/experimental/trunk@4775 de43f980-851b-0410-b2f7-c40aca1f87e0