Fix off-by-one mistake, Fixes #2300

          delete [] unit_style;

          unit_style = new char[len+1];

          fread(unit_style, sizeof(char), len, fp);

          unit_style[len+1] = '\0';

          unit_style[len] = '\0';

          fprintf(fptxt, "ITEM: UNITS\n");

          fprintf(fptxt, "%s\n", unit_style);

        }

        delete [] columns;

        columns = new char[len+1];

        fread(columns, sizeof(char), len, fp);

        columns[len+1] = '\0';

        columns[len] = '\0';

      }

      fread(&nchunk,sizeof(int),1,fp);