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_2_STABLE

Details
-------
http://git.postgresql.org/pg/commitdiff/530cbf6b10af156276d45687d14ca05cd4e39d16

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

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