Check for GiST index tuples that don't fit on a page.

The page splitting code would go into infinite recursion if you try to
insert an index tuple that doesn't fit even on an empty page.

Per analysis and suggested fix by Andrew Gierth. Fixes bug #11555, reported
by Bryan Seitz (analysis happened over IRC). Backpatch to all supported
versions.

Branch
------
REL9_3_STABLE

Details
-------
http://git.postgresql.org/pg/commitdiff/ef8ac584e0a7062101dc244566bfe0ca7a13496d

Modified Files
--------------
src/backend/access/gist/gist.c |   17 +++++++++++++++++
1 file changed, 17 insertions(+)


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