test suite fixed.


libmysql/libmysql.c:
  - fixed a bug in protocol -> host integer conversions in send_data_str
tests/client_test.c:
  Fixes to make client_test run on 64 bit Sun:
  - strlen() doesn't accept NULL input
  - Sun is high byte first, so we can't store bind 32-bit variables to 16-bit
  to MYSQL_TYPE_SHORT/TINY