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_3_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/49008d64507858678becf59f7e7caa75afb04cf2

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