Initialized all stack related values.

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

--- trunk/reactos/lib/rtl/thread.c	2005-07-21 18:22:45 UTC (rev 16683)
+++ trunk/reactos/lib/rtl/thread.c	2005-07-21 18:32:28 UTC (rev 16684)
@@ -88,6 +88,8 @@

     }
     
     /* Now set up some basic Initial TEB Parameters */

+    InitialTeb->PreviousStackBase = NULL;
+    InitialTeb->PreviousStackLimit = NULL;

     InitialTeb->AllocatedStackBase = (PVOID)Stack;
     InitialTeb->StackBase = (PVOID)(Stack + StackReserve);