sdl2-compat: minor clean-up

SDL Commits
1 
From a5d1e2a0dfd6b6b7d3fd257f3efccbb20e9c30e4 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Thu, 14 Aug 2025 07:21:24 +0300
Subject: [PATCH] minor clean-up

---
 src/sdl2_compat.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/sdl2_compat.c b/src/sdl2_compat.c
index b8a0a58..f1e50f0 100644
--- a/src/sdl2_compat.c
+++ b/src/sdl2_compat.c
@@ -6728,7 +6728,7 @@ static void SDL2COMPAT_SetEnvironmentVariable(SDL_Environment *env, const char *
     }
 }
 
-static void SynchronizeEnvironmentVariables()
+static void SynchronizeEnvironmentVariables(void)
 {
     SDL_Environment *env = SDL3_GetEnvironment();
     SDL_Environment *fresh_env = SDL3_CreateEnvironment(true);
@@ -9362,7 +9362,7 @@ SDL_ClearComposition(void)
 }
 
 SDL_DECLSPEC SDL2_bool SDLCALL
-SDL_IsTextInputShown()
+SDL_IsTextInputShown(void)
 {
     return SDL_IsTextInputActive();
 }