dsound/tests: Make sure to use return values (LLVM/Clang).

dlls/dsound/tests/ds3d8.c

@@ -648,7 +648,10 @@ static HRESULT test_secondary8(LPGUID lpGuid, int play,
                "IDirectSound8_CreateSoundBuffer(secondary) should have "
                "returned DSERR_INVALIDPARAM, returned %08x\n", rc);
             if (secondary)
+            {
                 ref=IDirectSoundBuffer_Release(secondary);
+                ok(ref==0,"IDirectSoundBuffer_Release() primary has %d references, should have 0\n",ref);
+            }
             init_format(&wfx,WAVE_FORMAT_PCM,22050,16,1);
         }