pgsql: Don't prematurely free the BufferAccessStrategy in pgstat_heap()

Don't prematurely free the BufferAccessStrategy in pgstat_heap().

This function continued to use it after heap_endscan() freed it.  In
passing, don't explicit create a strategy here.  Instead, use the one
created by heap_beginscan_strat(), if any.  Back-patch to 9.2, where use
of a BufferAccessStrategy here was introduced.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/9d0826c595e2a376f6645eb575a9d81d5f5ececf

Modified Files
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contrib/pgstattuple/pgstattuple.c |   13 +++++--------
1 file changed, 5 insertions(+), 8 deletions(-)