Filip Roséen authored May 09, 2016 and Jean-Baptiste Kempf committed May 09, 2016

 - Moved variables to a more narrow scope (where they belong)

 - Properly ignore cue types that we currently cannot handle correctly
   (since doing otherwise will lead to unexpected (and wrong) behavior
   further down the road).

   This should be fixed, but the changes required are rather big; and a
   discussion regarding just how we should handle the relevant matroska
   elements is necesary.

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>