farlook bullet-proofing

farlook bullet-proofing

When examining a buried object (after detection has revealed it),
suppress setting of its dknown bit when hero is adjacent.  [That
couldn't actually happen, because the glyph on the map that we're
trying to examine would be replaced by one for whatever is on the
surface when sighted hero moved next to it, and an earlier clause
in the same test prevents blinded hero from getting to this point.]