From 0bd04866e8bf2f6f709aeb61a1707b0ae9e85049 Mon Sep 17 00:00:00 2001
From: Frank Richter <frank.richter@gmail.com>
Date: Tue, 12 Jul 2005 16:59:20 +0000
Subject: [PATCH] Don't crash if NULL is passed as the class list to
 OpenThemeData().

---
 dlls/uxtheme/system.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/dlls/uxtheme/system.c b/dlls/uxtheme/system.c
index 4b3549edcf7..1d9a7b1f517 100644
--- a/dlls/uxtheme/system.c
+++ b/dlls/uxtheme/system.c
@@ -330,6 +330,8 @@ HTHEME WINAPI OpenThemeData(HWND hwnd, LPCWSTR pszClassList)
     if(!pszUseClassList)
         pszUseClassList = pszClassList;
 
+    if (!pszClassList) return NULL;
+    
     hTheme = MSSTYLES_OpenThemeClass(pszAppName, pszUseClassList);
     if(IsWindow(hwnd))
         SetPropW(hwnd, MAKEINTATOMW(atWindowTheme), hTheme);
-- 
2.11.4.GIT