https://gitlab.xiph.org/xiph/ogg/-/merge_requests/14

From f6097edcf4fe5ff40077fec7733fe32827f75128 Mon Sep 17 00:00:00 2001
From: Sam James <sam@gentoo.org>
Date: Wed, 23 Nov 2022 03:23:55 +0000
Subject: [PATCH] ogg.m4: fix -Wstrict-prototypes

Signed-off-by: Sam James <sam@gentoo.org>
--- a/ogg.m4
+++ b/ogg.m4
@@ -62,7 +62,7 @@ dnl
 #include <string.h>
 #include <ogg/ogg.h>
 
-int main ()
+int main (void)
 {
   system("touch conf.oggtest");
   return 0;
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