UnityAppController.mm modification

- (void)applicationDidEnterBackground:(UIApplication*)application
{
    ::printf("-> applicationDidEnterBackground()\n");

    if(_unityAppReady)
    {
        UnitySetPlayerFocus(0);

        _wasPausedExternal = UnityIsPaused();
        if (_wasPausedExternal == false)
        {
            // do pause unity only if we dont need special background processing
            // otherwise batched player loop can be called to run user scripts
            int bgBehavior = UnityGetAppBackgroundBehavior();
            if(bgBehavior == appbgSuspend || bgBehavior == appbgExit)
            {
                // Force player to do one more frame, so scripts get a chance to render custom screen for minimized app in task manager.
                // NB: UnityWillPause will schedule OnApplicationPause message, which will be sent normally inside repaint (unity player loop)
                // NB: We will actually pause after the loop (when calling UnityPause).
                UnityWillPause();
                [self repaint];
                UnityPause(1);

                // this is done on the next frame so that
                // in the case where unity is paused while going
                // into the background and an input is deactivated
                // we don't mess with the view hierarchy while taking
                // a view snapshot (case 760747).
                dispatch_async(dispatch_get_main_queue(), ^{
                    _snapshotView = [self createSnapshotView];
                    if(_snapshotView)
                        [_rootView addSubview:_snapshotView];
                });
            }

            //Periodically force Unity to run the update loop while going to the background
            [UnityiOSForcedUpdater startBackgroundUpdateTimer];
        }
    }

    _didResignActive = true;
}