Make sure we hold the joystick lock when updating the device state while opening it

src/joystick/SDL_joystick.c

@@ -573,8 +573,6 @@ SDL_JoystickOpen(int device_index)
     joystick->next = SDL_joysticks;
     SDL_joysticks = joystick;
 
-    SDL_UnlockJoysticks();
-
     /* send initial battery event */
     initial_power_level = joystick->epowerlevel;
     joystick->epowerlevel = SDL_JOYSTICK_POWER_UNKNOWN;
@@ -582,6 +580,8 @@ SDL_JoystickOpen(int device_index)
 
     driver->Update(joystick);
 
+    SDL_UnlockJoysticks();
+
     return joystick;
 }