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
------
REL8_4_STABLE

Details
-------
http://git.postgresql.org/pg/commitdiff/cd99d20550a36c673cc5003c7987f816d6cd3eb3

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

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