SDL: main: Fixed compiler warning on Android.

From 848dcf8a5fdfdd3dfbd1aabccb66794769d086bf Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <[EMAIL REDACTED]>
Date: Sun, 18 Feb 2024 00:49:20 -0500
Subject: [PATCH] main: Fixed compiler warning on Android.

(the NDK got upset about a function with void params using a bare `()`.)
---
 src/main/SDL_main_callbacks.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main/SDL_main_callbacks.h b/src/main/SDL_main_callbacks.h
index 5a906cfc8e65b..54cda2fca275c 100644
--- a/src/main/SDL_main_callbacks.h
+++ b/src/main/SDL_main_callbacks.h
@@ -22,7 +22,7 @@
 #ifndef SDL_main_callbacks_h_
 #define SDL_main_callbacks_h_
 
-SDL_bool SDL_HasMainCallbacks();
+SDL_bool SDL_HasMainCallbacks(void);
 int SDL_InitMainCallbacks(int argc, char *argv[], SDL_AppInit_func appinit, SDL_AppIterate_func _appiter, SDL_AppEvent_func _appevent, SDL_AppQuit_func _appquit);
 int SDL_IterateMainCallbacks(SDL_bool pump_events);
 void SDL_QuitMainCallbacks(void);