SDL_image: IMG_stb.c: silence uninitialized warnings

SDL Commits
1 
From b324fd92e358e9f1536698996228f6f804073323 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Sat, 4 Mar 2023 17:50:50 +0300
Subject: [PATCH] IMG_stb.c: silence uninitialized warnings

---
 IMG_stb.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/IMG_stb.c b/IMG_stb.c
index c78889ee..b4f4f564 100644
--- a/IMG_stb.c
+++ b/IMG_stb.c
@@ -96,6 +96,7 @@ SDL_Surface *IMG_LoadSTB_RW(SDL_RWops *src)
     rw_callbacks.read = IMG_LoadSTB_RW_read;
     rw_callbacks.skip = IMG_LoadSTB_RW_skip;
     rw_callbacks.eof = IMG_LoadSTB_RW_eof;
+    w = h = format = 0; /* silence warning */
     pixels = stbi_load_from_callbacks(
         &rw_callbacks,
         src,