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_5_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/fb990ce6c7d99d329843e5d70d4cdaf8d0825b38

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