applemedia: atdec: 1st round of fixes
applemedia: atdec: remove c++ style comments
applemedia: atdec: destroy the queue if set_format fails
tsdemux: Remember requested seek rate and use it

The new seek handling re-creates the segment time information once it
has enough information after a seek.

The problem was that we'd completely ignore the requested rate. So store
that and use it in the newly created segment.

https://bugzilla.gnome.org/show_bug.cgi?id=694369
mpegtsmux: avoid using clipped out buffers

If a buffer was entirely clipped out (ie, it's out of the segment
entirely), we'll end up with a NULL buffer, which we don't want
to process/dereference.
pesparse: Demote a Warning

We actually now know what to do ... have a log message :)
codecparser: Make warnings more meaningful

By stating whether we don't have enough data or it's a corrupted
packet
mpegtsdemux: Add more flag debugging for PES and TS packets

Helps with debugging issues. And also remove unused variable (opcr)

This will also allow us in the future to properly detect:
* random-access location (to enable keyframe observation and
  potentially seeking
* discont location (to properly handle resets)
* splice location (to properly handle new stream changes)