pgsql: Fix psql crash while parsing SQL file whose encoding is differen

Fix psql crash while parsing SQL file whose encoding is different from
client encoding and the client encoding is not *safe* one. Such an
example is, file encoding is UTF-8 and client encoding SJIS. Patch
contributed by Jiang Guiqing.

Branch
------
REL9_1_STABLE

Details
-------
http://git.postgresql.org/pg/commitdiff/a7c53092d88bf9c617713389bc11f0670762b723

Modified Files
--------------
src/bin/psql/psqlscan.l | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)

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