Fix crash

zet.dpi.c

@@ -163,10 +163,14 @@ static int write_topbar(int fd, enum page page, const char *id, const char *titl
 	rc |= write_buf(fd, ">");
 
 	if (page == PAGE_ZET) {
+		if (title == NULL) {
+			rc |= dprintf(fd, " <a href=\"%s\"><strong><code>§%s</code></strong></a>", id, id);
+		} else {
 			rc |= dprintf(fd, " <a href=\"%s\"><strong>[", id);
 			rc |= write_html(fd, title, strlen(title));
 			rc |= dprintf(fd, "](<code>§%s</code>)</strong></a>", id);
 		}
+	}
 
 	rc |= write_buf(fd, "</form>");
 	return rc;
@@ -757,6 +761,7 @@ static int dpi_serve_zet(int fd, char *path) {
 
 	char buf[128];
 	char *title = zet_get_title_fd(note_fd, buf, sizeof(buf));
+	if (title == NULL) title = id;
 	rc = lseek(note_fd, 0, SEEK_SET);
 	if (rc < 0) return dpi_respond_err(fd, "lseek");