reset comment=NULL for each key in do_fingerprint(); fixes "no comment"

not showing on when running `ssh-keygen -l` on multiple keys where one
has a comment and other following keys do not. Patch from Markus Kuhn
via GHPR407, bz3580

diff --git a/usr.bin/ssh/ssh-keygen.c b/usr.bin/ssh/ssh-keygen.c
index 39d3519..7979930 100644 (file)
--- a/usr.bin/ssh/ssh-keygen.c
+++ b/usr.bin/ssh/ssh-keygen.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: ssh-keygen.c,v 1.467 2023/04/12 08:53:54 jsg Exp $ */
+/* $OpenBSD: ssh-keygen.c,v 1.468 2023/06/20 00:05:09 djm Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -976,6 +976,7 @@ do_fingerprint(struct passwd *pw)
                 * accept a public key prefixed with a hostname or options.
                 * Try a bare key first, otherwise skip the leading stuff.
                 */
+               comment = NULL;
                if ((public = try_read_key(&cp)) == NULL) {
                        i = strtol(cp, &ep, 10);
                        if (i == 0 || ep == NULL ||