SDL-1.2: atari:video:xbios: fix some warnings for -Wstrict-prototypes

From 8faa0c44ef41bcd6f06eaf5ade17b04c3045ad24 Mon Sep 17 00:00:00 2001
From: Thorsten Otto <[EMAIL REDACTED]>
Date: Fri, 15 Dec 2023 10:11:49 +0100
Subject: [PATCH] atari:video:xbios: fix some warnings for -Wstrict-prototypes

---
 src/video/xbios/SDL_xbios_tveille.h | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/video/xbios/SDL_xbios_tveille.h b/src/video/xbios/SDL_xbios_tveille.h
index 8a9cd7d46..9c5b93e52 100644
--- a/src/video/xbios/SDL_xbios_tveille.h
+++ b/src/video/xbios/SDL_xbios_tveille.h
@@ -36,11 +36,11 @@
 
 typedef struct {
 	unsigned long	version;
-	void		(*prg_ptr)();
-	void		(*kbd_ptr)();
-	void		(*vbl_ptr)();
+	void		(*prg_ptr)(void);
+	void		(*kbd_ptr)(void);
+	void		(*vbl_ptr)(void);
 	unsigned long	vbl_count;
-	void		(*oldkbd_ptr)();
+	void		(*oldkbd_ptr)(void);
 	unsigned long	off_count;
 	unsigned long	prg_size;
 	unsigned long	dummy1[4];
@@ -52,7 +52,7 @@ typedef struct {
 	unsigned char	enabled;	/* 0=enabled, 0xff=disabled */
 	unsigned char	serial_redir;
 	unsigned char	dummy4;
-	void		(*oldserial_ptr)();
+	void		(*oldserial_ptr)(void);
 } tveille_t;
 
 /*--- Functions prototypes ---*/