don't dereference a NULL pointer

Modified: trunk/reactos/ntoskrnl/ob/object.c

--- trunk/reactos/ntoskrnl/ob/object.c	2005-08-08 15:46:41 UTC (rev 17207)
+++ trunk/reactos/ntoskrnl/ob/object.c	2005-08-08 15:49:37 UTC (rev 17208)
@@ -347,7 +347,7 @@

 
     if (!NT_SUCCESS(Status))
     {

-        if (ObjectName->Buffer)

+        if (ObjectName != NULL && ObjectName->Buffer)

         {
             ExFreePool(ObjectName->Buffer);
         }