Handle all RTCICEConnectionState values in ARDVideoCallViewController

webrtc/examples/objc/AppRTCDemo/ios/ARDVideoCallViewController.m

 /*
  *  Copyright 2015 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 154 matching lines @@
 - (NSString *)statusTextForState:(RTCICEConnectionState)state {
   switch (state) {
     case RTCICEConnectionNew:
     case RTCICEConnectionChecking:
       return @"Connecting...";
     case RTCICEConnectionConnected:
     case RTCICEConnectionCompleted:
     case RTCICEConnectionFailed:
     case RTCICEConnectionDisconnected:
     case RTCICEConnectionClosed:
+    case RTCICEConnectionMax:
       return nil;
   }
 }
 
 - (void)showAlertWithMessage:(NSString*)message {
   UIAlertView* alertView = [[UIAlertView alloc] initWithTitle:nil
                                                       message:message
                                                      delegate:nil
                                             cancelButtonTitle:@"OK"
                                             otherButtonTitles:nil];
   [alertView show];
 }
 
 @end