[boost] crc.hpp:569 msvc warning C4800

Subject: [boost] crc.hpp:569 msvc warning C4800
From: Kenneth Porter (shiva_at_[hidden])
Date: 2019-04-13 19:35:51

<https://github.com/boostorg/crc/pull/2>

Visual Studio 2010-2019 issue this warning for crc.hpp line 569:

warning C4800: "'int' : forcing value to bool 'true' or 'false' 
(performance warning)

            bool const  quotient = remainder & high_bit_mask;

Replace with:

            bool const  quotient = (remainder & high_bit_mask) != 0;