[hpoussin] 18442: Don't always return STATUS_BUFFER_TOO_SMALL when an error occurs in ZwQueryValueKey.

Don't always return STATUS_BUFFER_TOO_SMALL when an error occurs in
ZwQueryValueKey.
The "if" was triggered because ValueInformation->DataLength is
0xcdcdcdcd at the return of the function
Modified: trunk/reactos/ntoskrnl/io/pnpmgr.c
  _____  

Modified: trunk/reactos/ntoskrnl/io/pnpmgr.c
--- trunk/reactos/ntoskrnl/io/pnpmgr.c	2005-10-14 13:00:18 UTC (rev
18441)
+++ trunk/reactos/ntoskrnl/io/pnpmgr.c	2005-10-14 13:04:11 UTC (rev
18442)
@@ -322,15 +322,18 @@

         *ResultLength = ValueInformation->DataLength;
         ZwClose(KeyHandle);
 
-        if (ValueInformation->DataLength > BufferLength)
-          Status = STATUS_BUFFER_TOO_SMALL;
-
         if (!NT_SUCCESS(Status))
         {
           ExFreePool(ValueInformation);
           return Status;
         }
 
+        if (ValueInformation->DataLength > BufferLength)
+        {
+          ExFreePool(ValueInformation);
+          return STATUS_BUFFER_TOO_SMALL;
+        }
+
         /* FIXME: Verify the value (NULL-terminated, correct format).
*/
 
         RtlCopyMemory(PropertyBuffer, ValueInformation->Data,