FYI: texi2dvi: be robust to a failing latex --help

[Akim Demaille]

Index: ChangeLog
from  Akim Demaille  <address@hidden>

        texi2dvi: be robust to a failing latex --help.
        * bin/texi2dvi (run_tex): here.

Index: util/texi2dvi
===================================================================
RCS file: /cvsroot/texinfo/texinfo/util/texi2dvi,v
retrieving revision 1.142
diff -u -u -r1.142 texi2dvi
--- util/texi2dvi 15 Apr 2009 13:43:21 -0000 1.142
+++ util/texi2dvi 15 Apr 2009 14:34:50 -0000
@@ -930,7 +930,7 @@
     # don't accept --help will generate a texput.log.
     tex_help_dir=$t2ddir/tex_help
     ensure_dir "$tex_help_dir"
-    tex_help=`cd "$tex_help_dir" >&6 && $tex --help </dev/null 2>&1`
+    tex_help=`cd "$tex_help_dir" >&6 && $tex --help </dev/null 2>&1 || true`
   fi
   if $no_line_error; then :; else
     # The mk program and perhaps others want to parse TeX's