oleaut32/tests: make sure a return value is used (LLVM/Clang) (2/6)

[Austin English]

https://testbot.winehq.org/JobDetails.pl?Key=9196

-- 
-Austin
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diff --git a/dlls/oleaut32/tests/tmarshal.c b/dlls/oleaut32/tests/tmarshal.c
index 42db771..c64c68a 100644
--- a/dlls/oleaut32/tests/tmarshal.c
+++ b/dlls/oleaut32/tests/tmarshal.c
@@ -1001,6 +1001,7 @@ static void test_typelibmarshal(void)
     IKindaEnumWidget_Release(pKEW);
 
     hr = IWidget_QueryInterface(pWidget, &IID_IDispatch, (void **)&pDispatch);
+    ok_ole_success(hr, IWidget_QueryInterface);
 
     /* call put_Name */
     VariantInit(&vararg[0]);