winmm/tests: Fix a pointer conversion warning on 64-bit.
diff --git a/dlls/winmm/tests/midi.c b/dlls/winmm/tests/midi.c
index 3abdb1d..4ceec33 100644
--- a/dlls/winmm/tests/midi.c
+++ b/dlls/winmm/tests/midi.c
@@ -233,7 +233,7 @@
/* The W95 ESFM Synthesis device reports NOTENABLED although
* GetVolume by handle works and music plays. */
- rc = midiOutGetVolume((HMIDIOUT)udev, &ovolume);
+ rc = midiOutGetVolume(UlongToHandle(udev), &ovolume);
ok((capsA.dwSupport & MIDICAPS_VOLUME) ? rc==MMSYSERR_NOERROR || broken(rc==MMSYSERR_NOTENABLED) : rc==MMSYSERR_NOTSUPPORTED, "midiOutGetVolume(dev=%d) rc=%s\n", udev, mmsys_error(rc));
/* Tests with midiOutSetvolume show that the midi mapper forwards
