Reduce depth for late captures with SEE < 0

[tomcant]

Results of variant vs control (10+0.1, NULL, 64MB, 8moves_v3.pgn):
Elo: 32.67 +/- 16.53, nElo: 45.25 +/- 22.75
LOS: 100.00 %, DrawRatio: 38.39 %, PairsRatio: 1.53
Games: 896, Wins: 286, Losses: 202, Draws: 408, Points: 490.0 (54.69 %)
Ptnml(0-2): [21, 88, 172, 120, 47], WL/DD Ratio: 0.72
LLR: 2.95 (100.0%) (-2.94, 2.94) [0.00, 10.00]
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SPRT ([0.00, 10.00]) completed - H1 was accepted