mysql-test/r/bigint.result:
  test results updated
mysql-test/r/type_decimal.result:
  test results updated
mysql-test/t/bigint.test:
  new tests added
mysql-test/t/type_decimal.test:
  error numbers updated
sql/item.h:
  round(9999999999999999999) fixed
sql/sql_yacc.yy:
  bug #715: SELECT YEAR+0 FROM foobar is parsed as 'SELECT' 'YEAR' '+0'   => syntax error
  unary '+' added