Parameter mismatch in `extract_starting_entry`

[Cryptosaurus]

There is a parameter mistmatch in extract_starting_entry:

• It is defined as taking a _download parameter here:

  plugin.video.sendtokodi/core/runtime/playback.py

  Line 266 in b15c98d

  def extract_starting_entry(url, _download):

• It is called with a download parameter there:

  plugin.video.sendtokodi/core/playback_selection.py

  Line 388 in b15c98d

  return extract_info(starting_entry['url'], download=False)

This causes the plugin to fail when receiving some (all?) Youtube URLs. Changing download to _download in resolve_starting_entry seems to fix it, but I don't know whether this is the right fix.