From fc3136e93d247301a9f3dbb03d294ba22d4f7b26 Mon Sep 17 00:00:00 2001
From: Aleksey Bragin <aleksey@reactos.org>
Date: Wed, 2 Jul 2008 10:00:12 +0000
Subject: [PATCH] - Prevent crashes when heapPtr is NULL, also fix broken heap
 magic output. Thanks Mephisto!

svn path=/trunk/; revision=34256
---
 reactos/lib/rtl/heap.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/reactos/lib/rtl/heap.c b/reactos/lib/rtl/heap.c
index 2e9e832e5d5..8ffe604f648 100644
--- a/reactos/lib/rtl/heap.c
+++ b/reactos/lib/rtl/heap.c
@@ -335,7 +335,10 @@ static HEAP *HEAP_GetPtr(
     HEAP *heapPtr = (HEAP *)heap;
     if (!heapPtr || (heapPtr->magic != HEAP_MAGIC))
     {
-        ERR("Invalid heap %p, magic:%4s!\n", heap,heapPtr->magic );
+        if (heapPtr)
+            ERR("Invalid heap %p, magic:%.4s!\n", heap, &heapPtr->magic );
+        else
+            ERR("Invalid heap %p!\n", heap );
         //KeDumpStackFrames(NULL);
         return NULL;
     }