npgsql - Npgsql2: [#1010495] Bad performance calling a (empty) function

Log Message:
-----------

[#1010495] Bad performance calling a (empty) function very often.
Now NpgsqlCommand caches previous results of internal checkings which were taking too much time if the command was used more than once.

Modified Files:
--------------
Npgsql2/src/Npgsql:
NpgsqlCommand.cs (r1.30 -> r1.31)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/npgsql/Npgsql2/src/Npgsql/NpgsqlCommand.cs.diff?r1=1.30&r2=1.31)