pgsql: Fix bug in to_tsquery().

Fix bug in to_tsquery().

We were using memcpy() to copy to a possibly overlapping memory region,
which is a no-no. Use memmove() instead.

Branch
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REL9_0_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/26d73ddac43667f80cec530ac8644beeecfd666f

Modified Files
--------------
src/backend/tsearch/to_tsany.c |    7 ++++++-
1 files changed, 6 insertions(+), 1 deletions(-)