SDL: Fixed missing return statement

SDL Commits
1 
From cc19b13bc38c17f43b0990633f8aff2920300e2c Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Sat, 24 Jul 2021 19:21:29 -0700
Subject: [PATCH] Fixed missing return statement

---
 src/joystick/linux/SDL_sysjoystick.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/joystick/linux/SDL_sysjoystick.c b/src/joystick/linux/SDL_sysjoystick.c
index 3e267e38f..c7de6e5f3 100644
--- a/src/joystick/linux/SDL_sysjoystick.c
+++ b/src/joystick/linux/SDL_sysjoystick.c
@@ -1003,6 +1003,7 @@ PrepareJoystickHwdata(SDL_Joystick *joystick, SDL_joylist_item *item)
         /* Get the number of buttons and axes on the joystick */
         ConfigJoystick(joystick, fd);
     }
+    return 0;
 }