Mine

int
journal_add_line(time_t tstart, time_t tstop,
                 const char *istart, const char *istop)
{
  int duration=1;

  printf(" tstart = %d, tstop = %d\n", tstart, tstop);

  duration = (tstop - tstart)/60;
  printf("stop = %s, start = %s\n", ctime(&tstop), ctime(&tstart));

  myjournal = realloc(myjournal,sizeof(char*)*(++jlen));
  myjournal[jlen - 2] =
    g_strdup_printf("<tr><td>%s</td><td>%s</td><td>%s</td><td>%s</td><td>%d</td></tr>\n",
          ctime(&tstart), istart, ctime(&tstop), istop, duration);
  myjournal[jlen - 1] = NULL;
  return jlen;
}