update for 6.1 final, nil animations block now okay

Author: mattneub

bk2ch06p316containerController/ch19p631containerController/ViewController.swift

@@ -41,7 +41,7 @@ class ViewController : UIViewController {
             toViewController:tovc,
             duration:0.4,
             options:.TransitionFlipFromLeft,
-            animations:{},
+            animations:nil,
             completion:{
                 _ in
                 // finally, finish up

bk2ch06p334containerEventForwarding/ch19p647containerEventForwarding/ViewController.swift

@@ -121,7 +121,7 @@ On flip we expect to see (ignoring parent messages):
                 toViewController:tovc,
                 duration:0.4,
                 options:.TransitionFlipFromLeft,
-                animations:{},
+                animations:nil,
                 completion:{
                     _ in
                     // finally, finish up