From: Joost VandeVondele <Joost.VandeVondele@gmail.com>
Date: Mon, 27 Feb 2017 00:41:58 +0000 (-0800)
Subject: Simplify skipping of plies with helper threads
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=1810c4d758674dc4de288ca782851e52874f8908;hp=1810c4d758674dc4de288ca782851e52874f8908

Simplify skipping of plies with helper threads

Replaces the HalfDensity array with an equivalent, compact implementation.
Includes suggestions by mcostalba & snicolet.

No functional change

Closes #1004
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