Mark lt as inline in PartialOrd

Author: rclanan

src/libcore/cmp.rs

@@ -209,6 +209,7 @@ pub trait PartialOrd: PartialEq {
  fn partial_cmp(&self, other: &Self) -> Option<Ordering>;
 
  /// This method tests less than (for `self` and `other`) and is used by the `<` operator.
+ #[inline]
  fn lt(&self, other: &Self) -> bool {
  match self.partial_cmp(other) {
  Some(Less) => true,