244c63f72a
Add virtual destructor to SampleGrabberCallback to let it properly destruct its subclass when calling 'detete this' Change-Id: I5f74f82314e22225a0a153c7f4bca531a79dd8f9 Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com> Reviewed-by: Yoann Lopes <yoann.lopes@digia.com>