SDL: Add missing `(void)` in functions params

From c2a55cd2c501ebb491773171d19f5f06d94ca258 Mon Sep 17 00:00:00 2001
From: Susko3 <[EMAIL REDACTED]>
Date: Tue, 26 Dec 2023 21:18:02 +0100
Subject: [PATCH] Add missing `(void)` in functions params

---
 src/video/windows/SDL_windowsevents.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/video/windows/SDL_windowsevents.c b/src/video/windows/SDL_windowsevents.c
index eadbe0a39478..3a950a26a024 100644
--- a/src/video/windows/SDL_windowsevents.c
+++ b/src/video/windows/SDL_windowsevents.c
@@ -406,7 +406,7 @@ typedef enum
     SDL_MOUSE_EVENT_SOURCE_PEN,
 } SDL_MOUSE_EVENT_SOURCE;
 
-static SDL_MOUSE_EVENT_SOURCE GetMouseMessageSource()
+static SDL_MOUSE_EVENT_SOURCE GetMouseMessageSource(void)
 {
     LPARAM extrainfo = GetMessageExtraInfo();
     /* Mouse data (ignoring synthetic mouse events generated for touchscreens) */