ieframe: Return S_FALSE in IWebBrowser2::get_Document when returning NULL.

dlls/ieframe/tests/webbrowser.c

@@ -4056,6 +4056,7 @@ static void test_SetAdvise(void)
     IViewObject2 *view;
     IAdviseSink *sink;
     IOleObject *oleobj;
+    IDispatch *doc;
     DWORD aspects, flags;
 
     if (!(browser = create_webbrowser())) return;
@@ -4115,6 +4116,11 @@ static void test_SetAdvise(void)
     hr = IViewObject2_SetAdvise(view, 0, 0, NULL);
     ok(hr == S_OK, "got %08x\n", hr);
 
+    doc = (void*)0xdeadbeef;
+    hr = IWebBrowser2_get_Document(browser, &doc);
+    ok(hr == S_FALSE, "get_Document failed: %08x\n", hr);
+    ok(!doc, "doc = %p\n", doc);
+
     IOleObject_Release(oleobj);
     IViewObject2_Release(view);
     IWebBrowser2_Release(browser);

dlls/ieframe/webbrowser.c

@@ -404,7 +404,7 @@ static HRESULT WINAPI WebBrowser_get_Document(IWebBrowser2 *iface, IDispatch **p
     }
 
     *ppDisp = disp;
-    return S_OK;
+    return disp ? S_OK : S_FALSE;
 }
 
 static HRESULT WINAPI WebBrowser_get_TopLevelContainer(IWebBrowser2 *iface, VARIANT_BOOL *pBool)