André Hentschel : msxml3: Fix possible NULL pointer access in heap_strdupW.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: c02b84d3c5f041942a46d5e87d9965a5e86989ff
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=c02b84d3c5f041942a46d5e87d...

Author: André Hentschel <nerv(a)dawncrow.de>
Date:   Sat Nov 17 22:52:35 2012 +0100

msxml3: Fix possible NULL pointer access in heap_strdupW.

---

 dlls/msxml3/msxml_private.h |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/dlls/msxml3/msxml_private.h b/dlls/msxml3/msxml_private.h
index 503a580..66baea8 100644
--- a/dlls/msxml3/msxml_private.h
+++ b/dlls/msxml3/msxml_private.h
@@ -194,7 +194,8 @@ static inline LPWSTR heap_strdupW(LPCWSTR str)
 
         size = (strlenW(str)+1)*sizeof(WCHAR);
         ret = heap_alloc(size);
-        memcpy(ret, str, size);
+        if(ret)
+            memcpy(ret, str, size);
     }
 
     return ret;