add missing KeEnter/LeaveCriticalRegion before/after aquireing/releasing resource lock

reactos/ntoskrnl/se

diff -u -r1.50 -r1.51
--- semgr.c	12 Nov 2004 12:05:05 -0000	1.50
+++ semgr.c	21 Nov 2004 18:35:05 -0000	1.51
@@ -1,4 +1,4 @@

-/* $Id: semgr.c,v 1.50 2004/11/12 12:05:05 ekohl Exp $

+/* $Id: semgr.c,v 1.51 2004/11/21 18:35:05 gdalsnes Exp $

  *
  * COPYRIGHT:         See COPYING in the top level directory
  * PROJECT:           ReactOS kernel

@@ -227,6 +227,7 @@

 VOID STDCALL
 SeLockSubjectContext(IN PSECURITY_SUBJECT_CONTEXT SubjectContext)
 {

+  KeEnterCriticalRegion();

   ExAcquireResourceExclusiveLite(&SepSubjectContextLock, TRUE);
 }
 

@@ -238,6 +239,7 @@

 SeUnlockSubjectContext(IN PSECURITY_SUBJECT_CONTEXT SubjectContext)
 {
   ExReleaseResourceLite(&SepSubjectContextLock);

+  KeLeaveCriticalRegion();

 }