Oh oops, thanks Ray, this should definitely be a Number.

git-svn-id: svn+ssh://src.earth.threerings.net/nenya/trunk@362 ed5b42cb-e716-0410-a449-f6a68f950b19

src/as/com/threerings/flash/path/HermiteFunc.as

@@ -54,7 +54,7 @@ public class HermiteFunc extends InterpFunc
     }
 
     /** Get the derivative of this function at a point. */
-    public function getSlope (t :Number) :int
+    public function getSlope (t :Number) :Number
     {
         if (t >= 1 || t < 0) { // cope with a funny startOffset
             return 0;