input_common: Fix crash when controller disconnects

src/input_common/sdl/sdl_impl.cpp

@@ -267,8 +267,10 @@ void SDLState::CloseJoystick(SDL_Joystick* sdl_joystick) {
                                               return joystick->GetSDLJoystick() == sdl_joystick;
                                           });
 
+    if (joystick_it != joystick_guid_list.end()) {
         (*joystick_it)->SetSDLJoystick(nullptr, nullptr);
     }
+}
 
 void SDLState::HandleGameControllerEvent(const SDL_Event& event) {
     switch (event.type) {