Scale animations now report when they've finished.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@3319 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/media/animation/ScaleAnimation.java

@@ -122,6 +122,11 @@ public class ScaleAnimation extends Animation
             _scale = scale;
             invalidate();
         }
+
+        // Check if the animation completed
+        if (weight >= 1.0f) {
+            _finished = true;
+        }
     }
 
     // documentation inherited