Just convert n to int64 in guestbook.templ.

web/guestbook.templ

@@ -72,8 +72,7 @@ templ Guestbook(captchaID, owner string, entries []*justguestbook.Entry, pageCou
 		</section>
 		if pageCount > 1 {
 			<section id="pagination">
-				{{ var n int64 = 1 }}
-				for ; n <= pageCount; n++ {
+				for n := int64(1); n <= pageCount; n++ {
 					{{ strN := strconv.FormatInt(n, 10) }}
 					<a href={ templ.URL("/guestbook?p=" + strN) }>{ strN }</a>
 				}