winmm: fix unchecked result in get_latency.
strip unnecessary +x from some files.
fix error with NEED_SPEEX use.
wasapi: reject unsupported stream_params formats.
wasapi: build fix - include correct files for resampler.
wasapi: pass eConsole rather than eMultimedia for the role, per MSDN.
wasapi: stub implementation of endpoint and audio session notifications.  untested.