SDL: stdinc: make SDL_stack_free evaluate to `((void)(data))` when alloca is usable. (f5ed7)

SDL Commits
1 
From f5ed7160bfbde413fc36e9aeeae8f6065a1f2f8c Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <[EMAIL REDACTED]>
Date: Sat, 30 May 2026 22:45:33 -0400
Subject: [PATCH] stdinc: make SDL_stack_free evaluate to `((void)(data))` when
 alloca is usable.

Fixes #15727.

(cherry picked from commit 67e6f5b7ee488dfc3cf4b33620b220ae72ff845e)
---
 include/SDL3/SDL_stdinc.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/SDL3/SDL_stdinc.h b/include/SDL3/SDL_stdinc.h
index 205f9bc3b644e..1f0917617305d 100644
--- a/include/SDL3/SDL_stdinc.h
+++ b/include/SDL3/SDL_stdinc.h
@@ -1306,7 +1306,7 @@ extern "C" {
 #define SDL_stack_free(data)
 #elif !defined(SDL_DISABLE_ALLOCA)
 #define SDL_stack_alloc(type, count)    (type*)alloca(sizeof(type)*(count))
-#define SDL_stack_free(data)
+#define SDL_stack_free(data)            ((void)(data))
 #else
 #define SDL_stack_alloc(type, count)    (type*)SDL_malloc(sizeof(type)*(count))
 #define SDL_stack_free(data)            SDL_free(data)