message: Add `failure_default` deserializer to `scroll_history`
diff: @@ -398,7 +398,7 @@ pub struct Config {
  tabspaces: usize,
  /// How much scrolling history to keep
  - #[serde(default="default_scroll_history")]
  + #[serde(default="default_scroll_history", deserialize_with="failure_default")]
  scroll_history: u32,
  }
  