bugfix: height should be stored as 4 bytes (max = 4.3bil) not 2 bytes (max = 65536)
bugfix: height should be stored as 4 bytes (max = 4.3bil) not 2 bytes (max = 65536)

libmetrocoin/libmetrocoin-blockchain,libtetcoin/libtetcoin-blockchain,libmetrocoin/libmetrocoin-blockchain,bitprim/bitprim-blockchain-replier,libmetrocoin/libmetrocoin-blockchain,libtetcoin/libtetcoin-blockchain,bitprim/bitprim-blockchain-replier,libtetcoin/libtetcoin-blockchain