ao_wasapi: Fix double free on uninit

Caused by incorrect conversion to the m_option API: since we don't allocate
the state ourselves, we also don't free it ourselves.
DOCS/man/en/ao.rst: Update wasapi:device=<id> documentation
Merge branch 'wasapi_options' into all_merged

* wasapi_options:
  DOCS/man/en/ao.rst: Update wasapi:device=<id> documentation
  ao_wasapi: Fix double free on uninit