[Orgmode] hang problem when setting tags in an indirect buffer

[Eddward DeVilla]

Hi,

   The file below will cause a hang if you open the second heading in
an indirect buffer using C-c C-x b and then try to set tags using C-c
C-c from within the indirect buffer.  In emacs 21.2.1 on cygwin, I can
exit the hang with C-g.  In emacs 21.1.1 on AIX, C-g doesn't not work
and I had to kill emacs.

------------- test.org -----------------------

* some random parent heading
*** Tag, I'm :it:

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