[mjansen] 74997: [SHELL32] Do not fail CFSFolder::GetDisplayNameOf with a NULL pidl, preventing another crash in shell32:CFSFolder

Author: mjansen
Date: Sun Jun 11 10:39:55 2017
New Revision: 74997

URL: http://svn.reactos.org/svn/reactos?rev=74997&view=rev
Log:
[SHELL32] Do not fail CFSFolder::GetDisplayNameOf with a NULL pidl, preventing another crash in shell32:CFSFolder

Modified:
    trunk/reactos/dll/win32/shell32/folders/CFSFolder.cpp

Modified: trunk/reactos/dll/win32/shell32/folders/CFSFolder.cpp
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/shell32/folders/C...
==============================================================================
--- trunk/reactos/dll/win32/shell32/folders/CFSFolder.cpp	[iso-8859-1] (original)
+++ trunk/reactos/dll/win32/shell32/folders/CFSFolder.cpp	[iso-8859-1] Sun Jun 11 10:39:55 2017
@@ -634,7 +634,7 @@
 HRESULT WINAPI CFSFolder::GetDisplayNameOf(PCUITEMID_CHILD pidl,
         DWORD dwFlags, LPSTRRET strRet)
 {
-    if (!pidl || !strRet)
+    if (!strRet)
         return E_INVALIDARG;

/* If it is a complex pidl, let the child handle it */
@@ -642,7 +642,7 @@
     {
         return SHELL32_GetDisplayNameOfChild(this, pidl, dwFlags, strRet);
     }
-    else if (!pidl->mkid.cb) /* empty pidl */
+    else if (pidl && !pidl->mkid.cb) /* empty pidl */
     {
         /* If it is an empty pidl return only the path of the folder */
         if ((GET_SHGDN_FOR(dwFlags) & SHGDN_FORPARSING) &&