pgsql: Do wal_level and hot standby checks when doing crash-then-archiv

Do wal_level and hot standby checks when doing crash-then-archive recovery.

CheckRequiredParameterValues() should perform the checks if archive recovery
was requested, even if we are going to perform crash recovery first.

Reported by Kyotaro HORIGUCHI. Backpatch to 9.2, like the crash-then-archive
recovery mode.

Branch
------
REL9_2_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/e7ec05562ed754fb60f75ea83efe103266a92015

Modified Files
--------------
src/backend/access/transam/xlog.c |    4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)