[2/3] winmm: Add .wav extension when searching for PlaySound.

[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://testbot.winehq.org/JobDetails.pl?Key=11694

Your paranoid android.


=== w2000pro (32 bit wave) ===
wave.c:1679: Test failed: PlaySound succeeded, got 1

=== wxppro (32 bit wave) ===
wave.c:1679: Test failed: PlaySound succeeded, got 1

=== w2003std (32 bit wave) ===
wave.c:1679: Test failed: PlaySound succeeded, got 1

=== wvistau64 (32 bit wave) ===
wave.c:1662: Test failed: PlaySound failed, got 0
wave.c:1666: Test failed: PlaySound failed, got 0
wave.c:1674: Test failed: PlaySound failed, got 0

=== w2008s64 (32 bit wave) ===
wave.c:1662: Test failed: PlaySound failed, got 0
wave.c:1666: Test failed: PlaySound failed, got 0
wave.c:1674: Test failed: PlaySound failed, got 0

=== wvistau64 (64 bit wave) ===
wave.c:1662: Test failed: PlaySound failed, got 0
wave.c:1666: Test failed: PlaySound failed, got 0
wave.c:1674: Test failed: PlaySound failed, got 0

=== w2008s64 (64 bit wave) ===
wave.c:1662: Test failed: PlaySound failed, got 0
wave.c:1666: Test failed: PlaySound failed, got 0
wave.c:1674: Test failed: PlaySound failed, got 0