Fix Render discard issue [pd-3ds]

- Clip Rects do now not discard when they move out of screen (cause the maths ends in < 0 which is not working with u32)
- Fixing ui7 crash wehn im input was nullptr

source/ui7/container/image.cpp

@@ -26,6 +26,7 @@ SOFTWARE.
 namespace PD {
 namespace UI7 {
 PD_API void Image::Draw() {
+  if (!img) return;
   // Assert(io.get() && list.get(), "Did you run Container::Init correctly?");
   // Assert(img.get(), "Image is nullptr!");
   // io->Ren->OnScreen(screen);