SDL: Fix variable may be uninitialized when used here [-Wconditional-uninitialized]

From a4a80c86077c4e2de005f02b6102666c22821df3 Mon Sep 17 00:00:00 2001
From: Sylvain <[EMAIL REDACTED]>
Date: Wed, 9 Mar 2022 15:21:55 +0100
Subject: [PATCH] Fix variable may be uninitialized when used here
 [-Wconditional-uninitialized]

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

diff --git a/src/video/SDL_video.c b/src/video/SDL_video.c
index 33cde9bccc9..bd7d44f8e60 100644
--- a/src/video/SDL_video.c
+++ b/src/video/SDL_video.c
@@ -2451,9 +2451,9 @@ SDL_SetWindowFullscreen(SDL_Window * window, Uint32 flags)
 static SDL_Surface *
 SDL_CreateWindowFramebuffer(SDL_Window * window)
 {
-    Uint32 format;
+    Uint32 format = 0;
     void *pixels = NULL;
-    int pitch;
+    int pitch = 0;
     int bpp;
     Uint32 Rmask, Gmask, Bmask, Amask;
     SDL_bool created_framebuffer = SDL_FALSE;