Fix ASEAN Chess

Fix ASEAN Chess

Variant asean did not put the Pawns on 3rd rank since the "=3" suffix
was used to indicate Makruk, as ASEAN has a normal 1-rank promotion zone.
By adding "=1" as a kludge, and later resetting the 'makruk' variable
that controls the zone width, it now sets up the correct position.