Log Message:
-----------
cleaned up UpdatedRowSource code and added value validation rather than type validation.
Modified Files:
--------------
Npgsql2/src/Npgsql:
NpgsqlCommand.cs (r1.54 -> r1.55)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/npgsql/Npgsql2/src/Npgsql/NpgsqlCommand.cs?r1=1.54&r2=1.55)