Log Message:
-----------
Improve handleing of closed connections and non-pooled connections
Modified Files:
--------------
Npgsql2/src/Npgsql:
NpgsqlTransactionCallbacks.cs (r1.1 -> r1.2)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/npgsql/Npgsql2/src/Npgsql/NpgsqlTransactionCallbacks.cs.diff?r1=1.1&r2=1.2)