From 33d1ad1098a1601f5bba5768b0b252dfd70170b9 Mon Sep 17 00:00:00 2001
From: Rob Shearman <rob@codeweavers.com>
Date: Wed, 24 Oct 2007 16:16:14 +0100
Subject: [PATCH] credui: The pUIInfo parameter is optional to
 CredUIPromptForCredentials, so check before dereferencing it to get the
 parent window.

---
 dlls/credui/credui_main.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/dlls/credui/credui_main.c b/dlls/credui/credui_main.c
index b9b90d00c18..c3131079f49 100644
--- a/dlls/credui/credui_main.c
+++ b/dlls/credui/credui_main.c
@@ -212,7 +212,8 @@ DWORD WINAPI CredUIPromptForCredentialsW(PCREDUI_INFOW pUIInfo,
     params.fSave = pfSave ? *pfSave : FALSE;
 
     ret = DialogBoxParamW(hinstCredUI, MAKEINTRESOURCEW(IDD_CREDDIALOG),
-                          pUIInfo->hwndParent, CredDialogProc, (LPARAM)&params);
+                          pUIInfo ? pUIInfo->hwndParent : NULL,
+                          CredDialogProc, (LPARAM)&params);
     if (ret <= 0)
         return GetLastError();