Reparent tree iter

[Ian Liu <ian liu88 gmail com>]

Hi list,

I have a GtkTreeStore and I wanted to re-parent a leaf iterator.
I asked on the #irc but I was told to fetch all data, append it on the
correct parent and remove the first one. But I'm having some problems

with the cursor-move event when doing this (obviously because the original
selected iter is gone).

I'm wondering if there is a way to re-parent an iter without destroying it.

Thanks!
Ian L.