mmdevapi: Add return value which happens on wow64 and pure 64-bit.

dlls/mmdevapi/tests/render.c

@@ -165,7 +165,9 @@ static void test_audioclient(IAudioClient *ac)
         ok(pwfx2 == NULL, "pwfx2 non-null on exclusive IsFormatSupported\n");
 
         hr = IAudioClient_IsFormatSupported(ac, 0xffffffff, pwfx, NULL);
-        ok(hr == E_INVALIDARG, "IsFormatSupported(0xffffffff) call returns %08x\n", hr);
+        ok(hr == E_INVALIDARG ||
+           hr == AUDCLNT_E_UNSUPPORTED_FORMAT,
+           "IsFormatSupported(0xffffffff) call returns %08x\n", hr);
     }
 
     test_uninitialized(ac);