Please test on Windows: waveOutGet/SetVolume

[Ken Thomases]

Hi,

Can I ask folks with Windows available to them to run a test for me?   
I'm attaching a patch for the winmm wave.c test to test the behavior  
of waveOutSetVolume and waveOutGetVolume, in particular the difference  
between setting/getting the volume with a device identifier versus a  
handle to an open instance of the device.

The new tests are designed to fail, in order to produce maximal  
diagnostic output.

Thanks,
Ken