wbemprox: Set obj to NULL on error in get_object().

dlls/wbemprox/services.c

@@ -463,7 +463,11 @@ HRESULT get_object( const WCHAR *object_path, IWbemClassObject **obj )
         return hr;
     }
     hr = IEnumWbemClassObject_Next( iter, WBEM_INFINITE, 1, obj, &count );
-    if (hr == WBEM_S_FALSE) hr = WBEM_E_NOT_FOUND;
+    if (hr == WBEM_S_FALSE)
+    {
+        hr = WBEM_E_NOT_FOUND;
+        *obj = NULL;
+    }
     IEnumWbemClassObject_Release( iter );
     free_path( path );
     return hr;

dlls/wbemprox/tests/query.c

@@ -338,19 +338,23 @@ static void test_Win32_Service( IWbemServices *services )
     service = NULL;
     hr = IWbemServices_GetObject( services, NULL, 0, NULL, &service, NULL );
     ok( hr == S_OK, "got %08x\n", hr );
-    if (service) IWbemClassObject_Release( service );
+    ok( !!service, "expected non-NULL service\n" );
+    IWbemClassObject_Release( service );
 
     service = NULL;
     hr = IWbemServices_GetObject( services, empty, 0, NULL, &service, NULL );
     ok( hr == S_OK, "got %08x\n", hr );
-    if (service) IWbemClassObject_Release( service );
+    ok( !!service, "expected non-NULL service\n" );
+    IWbemClassObject_Release( service );
 
     SysFreeString( empty );
     SysFreeString( class );
 
     class = SysAllocString( L"Win32_Service.Name=\"nonexistent\"" );
+    service = (IWbemClassObject *)0xdeadbeef;
     hr = IWbemServices_GetObject( services, class, 0, NULL, &service, NULL );
     ok( hr == WBEM_E_NOT_FOUND, "got %#08x\n", hr );
+    ok( service == NULL, "expected NULL service, got %p\n", service );
     SysFreeString( class );
 }