Обсуждение: pgsql: Fix null pointer dereference in "\c" psql command.

Fix null pointer dereference in "\c" psql command.

The psql crash happened when no current connection existed.  (The second
new check is optional given today's undocumented NULL argument handling
in PQhost() etc.)  Back-patch to 9.0 (all supported versions).

Branch
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REL9_2_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/458ccbf2b3a9a8566a405368825954cf99b8dbef

Modified Files
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src/bin/psql/command.c |    6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)