[pgpool-committers: 5436] pgpool: Fix corner case bug with strip_quote().

[Tatsuo Ishii]

Fix corner case bug with strip_quote().

strip_quote(), which is called by pattern_compare() did not properly
handle empty query string case. In the worst case it could wipe out
memory after a pointer returned from malloc(), which could cause a
segmentation fault in free() called in pattern_compare().

Per bug 458.

Branch
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V3_5_STABLE

Details
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https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=8a9465759a1d0b698edd4ed4b20cdff977e1e843

Modified Files
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src/utils/pool_select_walker.c | 38 ++++++++++++++++++++++++++++++++------
1 file changed, 32 insertions(+), 6 deletions(-)