dmime/tests: Fix a memory leak (Valgrind).

Signed-off-by: Sven Baars <sven.wine@gmail.com>
Signed-off-by: Michael Stefaniuc <mstefani@winehq.org>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>

dlls/dmime/tests/performance.c

@@ -315,6 +315,9 @@ static void test_createport(void)
     ok(port == NULL, "Get IDirectMusicPort pointer? %p\n", port);
     ok(portparams.dwValidParams == 0, "portparams struct was filled in?\n");
 
+    hr = IDirectMusicPerformance8_CloseDown(perf);
+    ok(hr == S_OK, "CloseDown failed: %08x\n", hr);
+
     IDirectMusic_Release(music);
     IDirectMusicPerformance_Release(perf);
 }