From 2a6bccb4ce84092f4725e7bd64e33f09941522ea Mon Sep 17 00:00:00 2001
From: Katayama Hirofumi MZ <katayama.hirofumi.mz@gmail.com>
Date: Sat, 11 Apr 2020 08:45:23 +0900
Subject: [PATCH] [SHELL32] Make "Unable to get notification window" quiet

CORE-13950
---
 dll/win32/shell32/shelldesktop/CChangeNotify.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/dll/win32/shell32/shelldesktop/CChangeNotify.cpp b/dll/win32/shell32/shelldesktop/CChangeNotify.cpp
index 34c11809381..af4825cdaf8 100644
--- a/dll/win32/shell32/shelldesktop/CChangeNotify.cpp
+++ b/dll/win32/shell32/shelldesktop/CChangeNotify.cpp
@@ -45,6 +45,12 @@ DoGetNewDeliveryWorker(void)
         return s_hwndNewWorker;
 
     HWND hwndShell = GetShellWindow();
+    if (hwndShell == NULL)
+    {
+        TRACE("GetShellWindow() returned NULL\n");
+        return NULL;
+    }
+
     HWND hwndWorker = (HWND)SendMessageW(hwndShell, WM_GETDELIWORKERWND, 0, 0);
     if (!IsWindow(hwndWorker))
     {