message: Use `!is_empty()` instead of `len() > 0`
diff: @@ -386,7 +386,7 @@ impl Renderer {
  #[cfg(any(feature = "image", feature = "svg"))]
  {
  - if layer.images.len() > 0 {
  + if !layer.images.is_empty() {
  let scaled = transformation
  * Transformation::scale(scale_factor, scale_factor);
  