From: Marco Costalba <mcostalba@gmail.com>
Date: Sat, 4 Dec 2010 20:19:22 +0000 (+0100)
Subject: Fix a crash due to a broken Book::open()
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=97a6e1559e78dd31a5ecec9f3b35181f82942823;hp=97a6e1559e78dd31a5ecec9f3b35181f82942823

Fix a crash due to a broken Book::open()

Bug introduced in 9dcc2aad98b9703

We can be asked to open a non-exsistent file,
in this case we should gracefully handle the
case and silently return instead of exiting.

Bug discovered and bisected down by Joona.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
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