half float and other 3rd_party problems

[Sarah]

marian/src/3rd_party/half_float/umHalf.inl:347:15: error: ISO C++1z does not allow ‘register’ storage class specifier [-Werror=register]
register int expDiff = one.IEEE.Exp - two.IEEE.Exp;

how to fixit ?
thanks~

now , new problem occurs, and they are all about 3rd_party, so may you send the modified 3rd_party to me, thaaaaaanks