pgsql: Don't use ordinary NULL-terminated strings as Name datums.

Don't use ordinary NULL-terminated strings as Name datums.

Consumers are entitled to read the full 64 bytes pertaining to a Name;
using a shorter NULL-terminated string leads to reading beyond the end
its allocation; a SIGSEGV is possible.  Use the frequent idiom of
copying to a NameData on the stack.  New in 9.3, so no back-patch.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/ff53890f687c7f6b2a10db6661e9c32faf832636

Modified Files
--------------
src/backend/commands/alter.c         |    4 +++-
src/backend/commands/event_trigger.c |    8 ++++++--
2 files changed, 9 insertions(+), 3 deletions(-)