Fix for MKiCloudSync Crash

gistfile1.m

+(void) updateToiCloud:(NSNotification*) notificationObject {
    
    NSMutableDictionary *dict = [[[NSUserDefaults standardUserDefaults] dictionaryRepresentation] mutableCopy];
    for(NSString *keyName in dict.allKeys){
        NSString *keysToRemove = @"com.apple.audio.CoreAudio";
        NSInteger kL = keysToRemove.length;
        if(keyName.length>kL){
            NSString *keySub = [keyName substringToIndex:kL];
            if([keySub isEqualToString:keysToRemove]){
                [dict removeObjectForKey:keyName];
            }
        }
    }
    //NSLog(@"To iCloud: %@",dict.allKeys);
    [dict enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {
            [[NSUbiquitousKeyValueStore defaultStore] setObject:obj forKey:key];
    }];
    
    [[NSUbiquitousKeyValueStore defaultStore] synchronize];
    dict = nil;
}

+(void) updateFromiCloud:(NSNotification*) notificationObject {
    
    NSUbiquitousKeyValueStore *iCloudStore = [NSUbiquitousKeyValueStore defaultStore];
    NSMutableDictionary *dict = [[iCloudStore dictionaryRepresentation] mutableCopy];    
    for(NSString *keyName in dict.allKeys){
        NSString *keysToRemove = @"com.apple.audio.CoreAudio";
        NSInteger kL = keysToRemove.length;
        if(keyName.length>kL){
            NSString *keySub = [keyName substringToIndex:kL];
            if([keySub isEqualToString:keysToRemove]){
                [dict removeObjectForKey:keyName];
            }
        }
    }
     
     //NSLog(@"From iCloud: %@",dict.allKeys);
    // prevent NSUserDefaultsDidChangeNotification from being posted while we update from iCloud
    
    [[NSNotificationCenter defaultCenter] removeObserver:self 
                                                    name:NSUserDefaultsDidChangeNotification 
                                                  object:nil];

    [dict enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {
            [[NSUserDefaults standardUserDefaults] setObject:obj forKey:key];
    }];

    [[NSUserDefaults standardUserDefaults] synchronize];

    // enable NSUserDefaultsDidChangeNotification notifications again

    [[NSNotificationCenter defaultCenter] addObserver:self 
                                             selector:@selector(updateToiCloud:) 
                                                 name:NSUserDefaultsDidChangeNotification                                                    
												object:nil];
    
    [[NSNotificationCenter defaultCenter] postNotificationName:kMKiCloudSyncNotification object:nil];
    dict = nil;
}