SDL: Fixed build warning (f7454)

SDL Commits
1 
From f74549ef2ea6e8067261f0e3dceb1f2bdfdce6c7 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Sun, 28 May 2023 19:23:56 -0700
Subject: [PATCH] Fixed build warning

(cherry picked from commit 5007b963639bff2fa3359abbfe20d53ea9111fd9)
---
 src/joystick/windows/SDL_rawinputjoystick.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/joystick/windows/SDL_rawinputjoystick.c b/src/joystick/windows/SDL_rawinputjoystick.c
index 1b096b7fb3d6..f8414c4099ad 100644
--- a/src/joystick/windows/SDL_rawinputjoystick.c
+++ b/src/joystick/windows/SDL_rawinputjoystick.c
@@ -1604,7 +1604,7 @@ static void RAWINPUT_UpdateOtherAPIs(SDL_Joystick *joystick)
     if (!ctx->wgi_correlated) {
         SDL_bool new_correlation_count = 0;
         if (RAWINPUT_MissingWindowsGamingInputSlot()) {
-            Uint8 correlation_id;
+            Uint8 correlation_id = 0;
             WindowsGamingInputGamepadState *slot_idx = NULL;
             if (RAWINPUT_GuessWindowsGamingInputSlot(&match_state_xinput, &correlation_id, &slot_idx, xinput_correlated)) {
                 /* we match exactly one WindowsGamingInput device */