shell32/tests: make sure return values are used (LLVM/Clang) (4/7)

[Austin English]

-- 
-Austin
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diff --git a/dlls/shell32/tests/shlfileop.c b/dlls/shell32/tests/shlfileop.c
index 810a745..b2d778c 100644
--- a/dlls/shell32/tests/shlfileop.c
+++ b/dlls/shell32/tests/shlfileop.c
@@ -2058,6 +2058,7 @@ static void test_sh_create_dir(void)
     ok(ERROR_ALREADY_EXISTS == ret, "SHCreateDirectoryEx should fail to create existing directory, ret = %d\n", ret);
 
     ret = pSHCreateDirectoryExA(NULL, "c:\\testdir3", NULL);
+    ok(ERROR_SUCCESS == ret, "SHCreateDirectoryEx failed to create directory, ret = %d\n", ret);
     ok(file_exists("c:\\testdir3"), "The directory is not created\n");
 }