message: Provide correct default for scroll_history
  When implementing fallback to the default value with an u32 you will get
  0 as the default value.
  However the default scrollback value is 10_000. A custom deserializer
  has been implemented which automatically falls back to the correct
  default value.
diff: @@ -398,7 +398,7 @@ pub struct Config {
  tabspaces: usize,
  /// How much scrolling history to keep
  - #[serde(default="default_scroll_history", deserialize_with="failure_default")]
  + #[serde(default="default_scroll_history", deserialize_with="deserialize_scroll_history")]
  scroll_history: u32,
  }
  @@ -406,6 +406,18 @@ fn default_scroll_history() -> u32 {
  10_000
  }
  +fn deserialize_scroll_history<'a, D>(deserializer: D) -> ::std::result::Result<u32, D::Error>
  + where D: de::Deserializer<'a>
  +{
  + match u32::deserialize(deserializer) {
  + Ok(lines) => Ok(lines),
  + Err(err) => {
  + eprintln!("problem with config: {}; Using default value", err);
  + Ok(default_scroll_history())
  + },
  + }
  +}
  +
  fn failure_default_vec<'a, D, T>(deserializer: D) -> ::std::result::Result<Vec<T>, D::Error>
  where D: de::Deserializer<'a>,
  T: Deserialize<'a>
  