Log Message:
Changes 1.31:
* Recently introduced test sql_type_cast.t cannot work with DBI less
  than 1.611.
* Minor change to Makefile.PL to avoid use of unitialised warning on
  $ENV{LD_LIBRARY_PATH} in warning when it is not set.

Changes 1.30_7:
* Some time ago (I don't know when) a few internal errors generated by
  DBD::ODBC got ignored. There are about 5 of them but I seriously
  doubt anyone would hit any other than the data truncated error
  (which is reported by the ODBC driver anyway) and "no select
  statement currently executing". You can see rt_68720.t in the t
  directory for an example of the latter.
* An extra argument has been added to the sub associated with
  odbc_err_handler.  The arguments passed to the odbc_err_handler are
  now state (string), error (string), native error code (number) and
  the status returned from the last ODBC API. The status will be
  SQL_ERROR (-1) for errors or SQL_SUCCESS_WITH_INFO (1) for
  informational messages.