SDL_image: test/main.c: mark TestFormats() as SDLCALL after latest SDL3 changes

SDL Commits
1 
From a220c0a61db0cd5f4f96dccce9ae0a41b57c72ee Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Sat, 7 Sep 2024 01:10:20 +0300
Subject: [PATCH] test/main.c: mark TestFormats() as SDLCALL after latest SDL3
 changes

---
 test/main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/main.c b/test/main.c
index e5ddc0e8..59790f42 100644
--- a/test/main.c
+++ b/test/main.c
@@ -968,7 +968,7 @@ FormatTest(const Format *format)
     }
 }
 
-static int
+static int SDLCALL
 TestFormats(void *arg)
 {
     size_t i;