npgsql - Npgsql2: Change constructors so the Microsoft C# compiler

Log Message:
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Change constructors so the Microsoft C# compiler recognizes the fields have been set.

Modified Files:
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Npgsql2/src/NpgsqlTypes:
NpgsqlTypes.cs (r1.10 -> r1.11)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/npgsql/Npgsql2/src/NpgsqlTypes/NpgsqlTypes.cs.diff?r1=1.10&r2=1.11)