winmm/tests: Use BOOL type where appropriate

[Marvin]

Hi,

While running your changed tests on Windows, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?
Full results can be found at
https://newtestbot.winehq.org/JobDetails.pl?Key=2721

Your paranoid android.


=== wxppro (32 bit wave) ===
wave.c:498: Test failed: waveOutGetPosition(WAVE_MAPPER): returned 13211 bytes, should be 13230
wave.c:498: Test failed: waveOutGetPosition(WAVE_MAPPER): returned 13229 bytes, should be 13230
wave.c:498: Test failed: waveOutGetPosition(WAVE_MAPPER): returned 13075 bytes, should be 13230
wave.c:509: Test failed: waveOutGetPosition(WAVE_MAPPER): returned 13091 samples (13091 bytes), should be 13230 (13230 bytes)
wave.c:522: Test failed: waveOutGetPosition(WAVE_MAPPER): returned 594 ms, (13108 bytes), should be 600 (13230 bytes)
wave.c:498: Test failed: waveOutGetPosition(WAVE_MAPPER): returned 13220 bytes, should be 13230
wave.c:498: Test failed: waveOutGetPosition(WAVE_MAPPER): returned 17621 bytes, should be 17640
wave.c:509: Test failed: waveOutGetPosition(WAVE_MAPPER): returned 17634 samples (17634 bytes), should be 17640 (17640 bytes)
wave.c:498: Test failed: waveOutGetPosition(WAVE_MAPPER): returned 22016 bytes, should be 22050
wave.c:509: Test failed: waveOutGetPosition(WAVE_MAPPER): returned 22027 samples (22027 bytes), should be 22050 (22050 bytes)
wave.c:522: Test failed: waveOutGetPosition(WAVE_MAPPER): returned 999 ms, (22044 bytes), should be 1000 (22050 bytes)