https://gitlab.xiph.org/xiph/vorbis/-/merge_requests/25

From 63132c52ee4694171f663ecf536ab1236b6c46ba Mon Sep 17 00:00:00 2001
From: Sam James <sam@gentoo.org>
Date: Wed, 23 Nov 2022 03:27:44 +0000
Subject: [PATCH] vorbis.m4: fix -Wstrict-prototypes

Signed-off-by: Sam James <sam@gentoo.org>
--- a/vorbis.m4
+++ b/vorbis.m4
@@ -67,7 +67,7 @@ dnl
 #include <vorbis/codec.h>
 #include <vorbis/vorbisenc.h>
 
-int main ()
+int main (void)
 {
     vorbis_block 	vb;
     vorbis_dsp_state	vd;
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