pgsql: psql: Fix memory leak

psql: Fix memory leak

The command

\password username

leaked memory.

Branch
------
master

Details
-------
http://git.postgresql.org/pg/commitdiff/1b9f774090d58a950ef0535b51bc377ab62b795c

Modified Files
--------------
src/bin/psql/command.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)