prevent screensaver (#1485)

src/frontend/qt_sdl/main.cpp

@@ -3286,6 +3286,9 @@ int main(int argc, char** argv)
 
     SDL_JoystickEventState(SDL_ENABLE);
     
+    SDL_InitSubSystem(SDL_INIT_VIDEO);
+    SDL_EnableScreenSaver(); SDL_DisableScreenSaver();
+
     Config::Load();
 
 #define SANITIZE(var, min, max)  { var = std::clamp(var, min, max); }