luacom paralyzes os.exit

[Kenneth LO <kenlo88@...>]

This code will hang on my XP SP2.

  require "luacom"
  excel = luacom.CreateObject("Excel.Application")
  os.exit()

It will exit gracefully either without the second or the third line
(or both). Of course without requiring luacom, os.exit works all the
time.

At first I suspect that it is a compilation problem.  The luacom.dll
is kindly provided by Steve Donovan, which is a msvcr80 build.  Then I
recompile the cvs code by cross compilation on jaunty.  The same
problem still exists.