From 04a7c567572f19f0613408d4711d184bf257cad2 Mon Sep 17 00:00:00 2001
From: Eric Kohl <ekohl@abo.rhein-zeitung.de>
Date: Sat, 26 Jun 1999 11:55:56 +0000
Subject: [PATCH] Added check for invalid parent item.

---
 dlls/comctl32/treeview.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/dlls/comctl32/treeview.c b/dlls/comctl32/treeview.c
index 6dcfa0a7421..7068eaeab62 100644
--- a/dlls/comctl32/treeview.c
+++ b/dlls/comctl32/treeview.c
@@ -1389,6 +1389,13 @@ LRESULT WINAPI TREEVIEW_SortChildrenCB(
   /* Obtain the TVSORTBC struct */
   infoPtr->pCallBackSort = (LPTVSORTCB)lParam;
 
+  /* Check for a valid handle to the parent item */
+  if (!TREEVIEW_ValidItem(infoPtr, infoPtr->pCallBackSort->hParent))
+  {
+    ERR ("invalid item hParent=%d\n", (INT)infoPtr->pCallBackSort->hParent);
+    return FALSE;
+  }
+
   /* Obtain the parent node to sort */  
   sortMe = &infoPtr->items[ (INT)infoPtr->pCallBackSort->hParent ];