Log Message:
libebml: updated to 1.4.1

Release v1.4.1

* Fixed a case EbmlMaster::Read where the element returned via
  UpperEltFound and FountElt points to a just-deleted element,
  causing callers to think the memory returned is valid, potentially
  leading to use-after-free/double-free errors. This can happen if
  the specific element's Read function throws an exception when
  encountering certain invalid data constellations.