shell32/tests: Better check the result of SHGetDesktopFolder

[André Hentschel]

Might fix the crash in some NT4 systems
---
 dlls/shell32/tests/brsfolder.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/dlls/shell32/tests/brsfolder.c b/dlls/shell32/tests/brsfolder.c
index 7b87967..6e5e73b 100644
--- a/dlls/shell32/tests/brsfolder.c
+++ b/dlls/shell32/tests/brsfolder.c
@@ -331,7 +331,8 @@ static void test_selection(void)
 
     hr = SHGetDesktopFolder(&desktop_object);
     ok (SUCCEEDED(hr), "SHGetDesktopFolder failed with hr 0x%08x\n", hr);
-    if (FAILED(hr)) {
+    ok (desktop_object, "Expected desktop_object to be a valid interface\n");
+    if (FAILED(hr) || !desktop_object) {
         skip("SHGetDesktopFolder failed - skipping\n");
         return;
     }
-- 

Best Regards, André Hentschel