Fix win64 compile errors (ambiguous comparisons between unsigned_int and uint16)
Fix win64 compile errors (ambiguous comparisons between unsigned_int and uint16)

pmconrad/graphene,bigoc/openchain,cryptonomex/graphene,oxarbitrage/bitshares-core,abitmore/bitshares-2,oxarbitrage/bitshares-core,pmconrad/graphene,bitsuperlab/cpp-play2,abitmore/bitshares-2,bitsuperlab/cpp-play2,abitmore/bitshares-2,bitshares/bitshares-2,pmconrad/graphene,oxarbitrage/bitshares-core,cryptonomex/graphene,peertracksinc/muse,bitshares/bitshares-2,abitmore/bitshares-2,bigoc/openchain,bitshares/bitshares-2,cryptonomex/graphene,bigoc/openchain,bitshares/bitshares-2,peertracksinc/muse,peertracksinc/muse,pmconrad/graphene,bitsuperlab/cpp-play2,oxarbitrage/bitshares-core,peertracksinc/muse,bigoc/openchain