pgsql: Avoid unportable usage of sscanf(UINT64_FORMAT).

Avoid unportable usage of sscanf(UINT64_FORMAT).

On Mingw, it seems that scanf() doesn't necessarily accept the same format
codes that printf() does, and in particular it may fail to recognize %llu
even though printf() does. Since configure only probes printf() behavior
while setting up the INT64_FORMAT macros, this means it's unsafe to use
those macros with scanf(). We had only one instance of such a coding
pattern, in contrib/pg_stat_statements, so change that code to avoid
the problem.

Per buildfarm warnings. Back-patch to 9.0 where the troublesome code
was introduced.

Michael Paquier

Branch
------
REL9_0_STABLE

Details
-------
http://git.postgresql.org/pg/commitdiff/c8186b3c223e2abaf51808f7e74e6c03a2511938

Modified Files
--------------
contrib/pg_stat_statements/pg_stat_statements.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)