message: avoid named field shorthand
diff: @@ -185,7 +185,7 @@ impl GlyphCache {
  let style = if let Some(ref spec) = desc.style {
  font::Style::Specific(spec.to_owned())
  } else {
  - font::Style::Description {slant, weight}
  + font::Style::Description {slant:slant, weight:weight}
  };
  FontDesc::new(&desc.family[..], style)
  }
  