if (imap_exec (buf, sizeof (buf), ctx, seq, buf) != 0)
if (imap_exec (buf, sizeof (buf), ctx, seq, buf, 0) != 0)
int imap_check_mailbox (CONTEXT *ctx, int *index_hint){  char seq[8];  char buf[LONG_STRING];  static time_t checktime=0;  int msgcount = ctx->msgcount;  if (ImapCheckTime)  {    time_t k=time(NULL);    if (checktime && (k-checktime < ImapCheckTime)) return 0;    checktime=k;  }  imap_make_sequence (seq, sizeof (seq), ctx);  snprintf (buf, sizeof (buf), "%s NOOP\r\n", seq);  if (imap_exec (buf, sizeof (buf), ctx, seq, buf) != 0)  {    imap_error ("imap_check_mailbox()", buf);    return (-1);  }  return (msgcount != ctx->msgcount);}