if (cb->fnd_keys[i] == NULL) { printf ("%d: null\n", i);
if (cb->fnd_keys[i] == NULL)
initialize_keybox (HWND dlg, struct recipient_cb_s *cb){    size_t i;    HWND box = GetDlgItem (dlg, IDC_ENC_NOTFOUND);    HWND rset = GetDlgItem (dlg, IDC_ENC_RSET1);    for (i=0; cb->unknown_keys[i] != NULL; i++)	SendMessage (box, LB_ADDSTRING, 0, (LPARAM)(const char *)cb->unknown_keys[i]);    for (i=0; i < cb->n; i++) {	int n;	if (cb->fnd_keys[i] == NULL) {	    printf ("%d: null\n", i);	    continue;	}	n = find_item (rset, cb->fnd_keys[i]);	if (n != -1)	    copy_item (dlg, IDC_ENC_RSET1, n);    }}