gamepad: Fix inability to disable SDL_EVENT_GAMEPAD_UPDATE_COMPLETE events

(cherry picked from commit 712c76fdc1)

src/joystick/SDL_gamepad.c

@@ -405,6 +405,7 @@ static bool SDLCALL SDL_GamepadEventWatcher(void *userdata, SDL_Event *event)
     {
         SDL_AssertJoysticksLocked();
 
+        if (SDL_EventEnabled(SDL_EVENT_GAMEPAD_UPDATE_COMPLETE)) {
             for (gamepad = SDL_gamepads; gamepad; gamepad = gamepad->next) {
                 if (gamepad->joystick->instance_id == event->jdevice.which) {
                     SDL_Event deviceevent;
@@ -416,6 +417,7 @@ static bool SDLCALL SDL_GamepadEventWatcher(void *userdata, SDL_Event *event)
                     break;
                 }
             }
+        }
     } break;
     default:
         break;