urlmon/tests: make sure a return value is used (LLVM/Clang)

[Austin English]

-- 
-Austin
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diff --git a/dlls/urlmon/tests/url.c b/dlls/urlmon/tests/url.c
index d752759..5ff49ef 100644
--- a/dlls/urlmon/tests/url.c
+++ b/dlls/urlmon/tests/url.c
@@ -324,6 +324,7 @@ static void test_create(void)
     ok(hr == S_OK, "got 0x%08x\n", hr);
 
     hr = CreateBindCtx(0, &bctx);
+    ok(hr == S_OK, "got 0x%08x\n", hr);
 
     stream = (void*)0xdeadbeef;
     hr = IMoniker_BindToStorage(mon, bctx, NULL, &IID_IStream, (void**)&stream);