SDL: Fixed uninitialized variable

SDL Commits
1 
From 35c13196f0104d23a4ed2f3f32e13854e0eda0de Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Wed, 8 Mar 2023 08:40:38 -0800
Subject: [PATCH] Fixed uninitialized variable

---
 src/joystick/SDL_joystick.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/joystick/SDL_joystick.c b/src/joystick/SDL_joystick.c
index aad453ab57dc..0a74be113612 100644
--- a/src/joystick/SDL_joystick.c
+++ b/src/joystick/SDL_joystick.c
@@ -202,7 +202,7 @@ static SDL_bool SDL_GetDriverAndJoystickIndex(int device_index, SDL_JoystickDriv
 
 static int SDL_FindFreePlayerIndex()
 {
-    int player_index;
+    int player_index = -1;
 
     SDL_AssertJoysticksLocked();