Add assertion to catch binary_type test fails in VC++.
Add assertion to catch binary_type test fails in VC++.

swansontec/libbitcoin,GroestlCoin/libgroestlcoin,GroestlCoin/libgroestlcoin,GroestlCoin/libgroestlcoin,swansontec/libbitcoin,swansontec/libbitcoin,GroestlCoin/libgroestlcoin,swansontec/libbitcoin