https://github.com/kazu-yamamoto/pgpdump/pull/45

From 541442dc04259bde680b46742522177be40cc065 Mon Sep 17 00:00:00 2001
From: Sam James <sam@gentoo.org>
Date: Sun, 17 Nov 2024 02:04:03 +0000
Subject: [PATCH] Fix C23 compatibility

C23 removes unprototyped functions, so fix the function pointer type.
---
 packet.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/packet.c b/packet.c
index b6f3665..bdd3d3e 100644
--- a/packet.c
+++ b/packet.c
@@ -4,7 +4,7 @@
 
 #include "pgpdump.h"
 
-typedef void (*funcptr)();
+typedef void (*funcptr)(int);
 
 private int get_new_len(int);
 private int is_partial(int);
@@ -91,7 +91,7 @@ TAG[] = {
 #define TAG_NUM (sizeof(TAG) * sizeof(string))
 
 private void
-(*tag_func[])() = {
+(*tag_func[])(int) = {
 	Reserved,
 	Public_Key_Encrypted_Session_Key_Packet,
 	Signature_Packet,