pgsql: pg_standby: Avoid writing one byte beyond the end of the buffer.

pg_standby: Avoid writing one byte beyond the end of the buffer.

Previously, read() might have returned a length equal to the buffer
length, and then the subsequent store to buf[len] would write a
zero-byte one byte past the end.  This doesn't seem likely to be
a security issue, but there's some chance it could result in
pg_standby misbehaving.

Spotted by Coverity; patch by Michael Paquier, reviewed by me.

Branch
------
REL9_4_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/7b65f194e9ef098e519bb6d4f792af71a4ab5778

Modified Files
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contrib/pg_standby/pg_standby.c |    2 +-
1 file changed, 1 insertion(+), 1 deletion(-)