message: Fix bug with cursor colors and old config
  There was no default supplied for Colors.cursor. This caused config
  not specifying that property to break. Adding a default should fix that.
diff: @@ -706,11 +706,19 @@ pub enum Error {
  #[derive(Debug, Deserialize)]
  pub struct Colors {
  primary: PrimaryColors,
  + #[serde(default="default_cursor_colors")]
  cursor: PrimaryColors,
  normal: AnsiColors,
  bright: AnsiColors,
  }
  +fn default_cursor_colors() -> PrimaryColors {
  + PrimaryColors {
  + foreground: Rgb { r: 0, g: 0, b: 0 },
  + background: Rgb { r: 0xff, g: 0xff, b: 0xff },
  + }
  +}
  +
  #[derive(Debug, Deserialize)]
  pub struct PrimaryColors {
  #[serde(deserialize_with = "rgb_from_hex")]
  @@ -726,10 +734,7 @@ impl Default for Colors {
  background: Rgb { r: 0, g: 0, b: 0 },
  foreground: Rgb { r: 0xea, g: 0xea, b: 0xea },
  },
  - cursor: PrimaryColors {
  - foreground: Rgb { r: 0, g: 0, b: 0 },
  - background: Rgb { r: 0xff, g: 0xff, b: 0xff },
  - },
  + cursor: default_cursor_colors(),
  normal: AnsiColors {
  black: Rgb {r: 0x00, g: 0x00, b: 0x00},
  red: Rgb {r: 0xd5, g: 0x4e, b: 0x53},
  