Improve compatability of ADORecordSet_empty
Improve compatability of ADORecordSet_empty

Added methods to ADORecordSet_empty to improve compatability with other
ADORecordSet_* types.

resolves #43, PR #45

Signed-off-by: Damien Regad <d9b599957bd54c22143053c16557076ca2185dbd@mantisbt.org>

pyscht/ADOdb,paulproteus/ADOdb,ipso/ADOdb,andrewnicols/ADOdb,azghanvi/ADOdb,azghanvi/ADOdb,andrewnicols/ADOdb,ipso/ADOdb,paulproteus/ADOdb,pyscht/ADOdb