Don't look up best move from transposition table in quiescent search
Don't look up best move from transposition table in quiescent search

The transposition table is responsible for lots of cache misses, let's
avoid that. This reduces `search-perf 9 8` from about 14.7s to 14.0s
(about 4-5%).

jwatzman/nameless-chessbot,jwatzman/nameless-chessbot