SDL-1.2: Xext: Fix function declarations without a prototype

SDL Commits
1 
From e738cfffced8a006094d55337d917386582ada47 Mon Sep 17 00:00:00 2001
From: orbea <[EMAIL REDACTED]>
Date: Sat, 15 Oct 2022 15:10:48 -0700
Subject: [PATCH] Xext: Fix function declarations without a prototype

This is not supported with the upcoming clang 16.

error: a function declaration without a prototype is deprecated in all versions of C and is treated as a zero-parameter prototype in C2x, conflicting with a subsequent definition [-Werror,-Wdeprecated-non-prototype]

reference: https://archives.gentoo.org/gentoo-dev/message/dd9f2d3082b8b6f8dfbccb0639e6e240
---
 src/video/Xext/XME/xme.c           | 2 +-
 src/video/Xext/Xinerama/Xinerama.c | 3 ++-
 src/video/Xext/Xv/Xv.c             | 6 +++---
 3 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/src/video/Xext/XME/xme.c b/src/video/Xext/XME/xme.c
index 2cead35ad..bb8d04d48 100644
--- a/src/video/Xext/XME/xme.c
+++ b/src/video/Xext/XME/xme.c
@@ -206,7 +206,7 @@ static char *xigmisc_extension_name = XIGMISC_PROTOCOL_NAME;
 /*
  * find_display - locate the display info block
  */
-static int XiGMiscCloseDisplay();
+static int XiGMiscCloseDisplay(Display*, XExtCodes*);
 
 static XExtensionHooks xigmisc_extension_hooks = {
     NULL,                               /* create_gc */
diff --git a/src/video/Xext/Xinerama/Xinerama.c b/src/video/Xext/Xinerama/Xinerama.c
index 4ff42ebfe..57f64b9c3 100644
--- a/src/video/Xext/Xinerama/Xinerama.c
+++ b/src/video/Xext/Xinerama/Xinerama.c
@@ -50,7 +50,8 @@ static /* const */ char *panoramiX_extension_name = PANORAMIX_PROTOCOL_NAME;
 #define PanoramiXSimpleCheckExtension(dpy,i) \
   XextSimpleCheckExtension (dpy, i, panoramiX_extension_name)
 
-static int close_display();
+static int close_display(Display*, XExtCodes*);
+
 static /* const */ XExtensionHooks panoramiX_extension_hooks = {
     NULL,				/* create_gc */
     NULL,				/* copy_gc */
diff --git a/src/video/Xext/Xv/Xv.c b/src/video/Xext/Xv/Xv.c
index 7147b9e8c..c254a1dc2 100644
--- a/src/video/Xext/Xv/Xv.c
+++ b/src/video/Xext/Xv/Xv.c
@@ -63,9 +63,9 @@ static char *xv_extension_name = XvName;
 #define XvCheckExtension(dpy, i, val) \
   XextCheckExtension(dpy, i, xv_extension_name, val)
 
-static char *xv_error_string();
-static int xv_close_display();
-static Bool xv_wire_to_event();
+static char *xv_error_string(Display*, int, XExtCodes*, char*, int);
+static int xv_close_display(Display*, XExtCodes*);
+static Bool xv_wire_to_event(Display*, XEvent*, xEvent*);
 
 static XExtensionHooks xv_extension_hooks = {
     NULL,                               /* create_gc */