Fix #24289: Prebuilt track designs using an invalid drawing state

src/openrct2/ride/TrackDesign.cpp

@@ -2131,6 +2131,8 @@ void TrackDesignDrawPreview(TrackDesign& td, uint8_t* pixels)
     auto drawingEngine = std::make_unique<X8DrawingEngine>(GetContext()->GetUiContext());
     dpi.DrawingEngine = drawingEngine.get();
 
+    drawingEngine->BeginDraw();
+
     const ScreenCoordsXY offset = { size_x / 2, size_y / 2 };
     for (uint8_t i = 0; i < 4; i++)
     {
@@ -2141,6 +2143,8 @@ void TrackDesignDrawPreview(TrackDesign& td, uint8_t* pixels)
         dpi.bits += kTrackPreviewImageSize;
     }
 
+    drawingEngine->EndDraw();
+
     ride->remove();
     UnstashMap();
 }