[fireball] 34256: - Prevent crashes when heapPtr is NULL, also fix broken heap magic output. Thanks Mephisto!

Author: fireball
Date: Wed Jul  2 05:00:12 2008
New Revision: 34256

URL: http://svn.reactos.org/svn/reactos?rev=34256&view=rev
Log:
- Prevent crashes when heapPtr is NULL, also fix broken heap magic output. Thanks Mephisto!

Modified:
    trunk/reactos/lib/rtl/heap.c

Modified: trunk/reactos/lib/rtl/heap.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/lib/rtl/heap.c?rev=34256&am...
==============================================================================
--- trunk/reactos/lib/rtl/heap.c [iso-8859-1] (original)
+++ trunk/reactos/lib/rtl/heap.c [iso-8859-1] Wed Jul  2 05:00:12 2008
@@ -335,7 +335,10 @@
     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;
     }