Fix crash in the new GiST insertion code, when an update splits the root page.

This bug was exercised by contrib/intarray/bench, as noted by Tom Lane.

Branch
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master

Details
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http://git.postgresql.org/gitweb?p=postgresql.git;a=commitdiff;h=ca63029eac379d82f78a985a5d4068b9954deb02

Modified Files
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src/backend/access/gist/gist.c |   30 ++++++++++++++++++------------
1 files changed, 18 insertions(+), 12 deletions(-)

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Next:	From: Magnus Hagander	Date: 2011-01-09 20:15:16
	Subject: pgsql: Split pg_start_backup() and pg_stop_backup() into two pieces
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	Subject: pgsql: Fix up core tsquery GIN support for new extractQuery API.