Public issue https://github.com/mackron/miniaudio/issues/850

Public issues
  https://github.com/mackron/miniaudio/issues/877
  https://github.com/mackron/miniaudio/issues/881

This is from c89atomic which has been fixed upstream.

Public issue https://github.com/mackron/miniaudio/issues/833

fix typos

Public issue https://github.com/mackron/miniaudio/issues/841

Public issue https://github.com/mackron/miniaudio/issues/836.

This adds the following flags:

  * MA_SOUND_FLAG_LOOPING
  * MA_RESOURCE_MANAGER_DATA_SOURCE_FLAG_LOOPING

These can be used to initialize sounds and resource managed data
sources to loop by default. This is the recommended way to enable
looping for streams. The `isLooping` config option in
`ma_sound_config` and `ma_resource_manager_data_source_config` has been
deprecated. If you are using those, you should switch to the new flag
or else you'll get compiler errors when upgrading to a future version.

Public issue https://github.com/mackron/miniaudio/issues/811