[weiden] 24583: Minor simplification

Author: weiden
Date: Fri Oct 20 18:26:41 2006
New Revision: 24583

URL: http://svn.reactos.org/svn/reactos?rev=24583&view=rev
Log:
Minor simplification

Modified:
    trunk/reactos/ntoskrnl/se/sd.c

Modified: trunk/reactos/ntoskrnl/se/sd.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/se/sd.c?rev=24583&...
==============================================================================
--- trunk/reactos/ntoskrnl/se/sd.c (original)
+++ trunk/reactos/ntoskrnl/se/sd.c Fri Oct 20 18:26:41 2006
@@ -411,9 +411,8 @@
       {
         /* first only probe and copy until the control field of the descriptor
            to determine whether it's a self-relative descriptor */
-        DescriptorSize = (ULONG)((ULONG_PTR)&OriginalSecurityDescriptor->Control -
-                                 (ULONG_PTR)OriginalSecurityDescriptor) +
-                         sizeof(OriginalSecurityDescriptor->Control);
+        DescriptorSize = FIELD_OFFSET(SECURITY_DESCRIPTOR,
+                                      Owner);
         ProbeForRead(OriginalSecurityDescriptor,
                      DescriptorSize,
                      sizeof(ULONG));