/* PSPP - a program for statistical analysis.
- Copyright (C) 2011 Free Software Foundation, Inc.
+ Copyright (C) 2011, 2012 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
interaction_to_string (const struct interaction *iact, struct string *str)
{
int v = 0;
+ if ( iact->n_vars == 0)
+ return;
ds_put_cstr (str, var_to_string (iact->vars[v]));
for (v = 1; v < iact->n_vars; ++v)
{