focalLength is read/write

std/flash9/geom/PerspectiveProjection.hx

@@ -4,7 +4,7 @@ extern class PerspectiveProjection	{
 
 	var projectionCenter : Point;
 	var fieldOfView : Float;
-	var focalLength(default,null) : Float;
+	var focalLength : Float;
 
 	function new() : Void;
 	function toMatrix3D() : Matrix3D;