Respond to CR.

// FREEBIE

Signal/src/call/CallService.swift

@@ -1434,8 +1434,8 @@ protocol CallServiceObserver: class {
     public func handleFailedCall(failedCall: SignalCall?, error: CallError) {
         AssertIsOnMainThread()
 
-        if case CallError.assertionError(description: let description) = error {
-            Logger.error(description)
+        if case CallError.assertionError(description:let description) = error {
+            owsFail(description)
         }
 
         if let failedCall = failedCall {

Signal/src/util/UIViewController+Permissions.m

@@ -65,9 +65,7 @@ NS_ASSUME_NONNULL_BEGIN
         callback(YES);
     } else if (status == AVAuthorizationStatusNotDetermined) {
         [AVCaptureDevice requestAccessForMediaType:AVMediaTypeVideo
-                                 completionHandler:^(BOOL granted) {
-                                     callback(granted);
-                                 }];
+                                 completionHandler:callback];
     } else {
         DDLogError(@"Unknown AVAuthorizationStatus: %ld", (long)status);
         callback(NO);
@@ -91,9 +89,7 @@ NS_ASSUME_NONNULL_BEGIN
         return;
     }
 
-    [[AVAudioSession sharedInstance] requestRecordPermission:^(BOOL granted) {
-        callback(granted);
-    }];
+    [[AVAudioSession sharedInstance] requestRecordPermission:callback];
 }
 
 @end