Ian Hickson ccf9859b0d Clamp overflows in Color.lerp. (#4141)
Previously, cases like:

```dart
Color.lerp(const Color(0xFF00FF7F), const Color(0xFF00FFFF), 1.1)
```

...would result in unexpected effects (in this instance, lerping
between these colors with a curve that overshoots would take what
should be a simple animation from pale green to blue and add some
flickering bright green whenever it overshoots).
2017-09-26 11:11:09 -07:00
..