Re: Small patch for GiST: move childoffnum to child

Actually, there is no more direct need of this patch because I've rewrote
insert function for fast build. But there are still two points for having
this changes:
1) As it was noted before, it simplifies code a bit.
2) It would be better if childoffnum have the same semantics in regular
insert and fastbuild insert.

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With best regards,
Alexander Korotkov.