Fixed Postgres library free/malloc corruption (expand parameters)
 . 1st. Fix parse twice last parameter
 . 2nd. This error occurred when a parameter is passed to
        createrowset and the same was not in parameters array.
        The invalid parameter is parsed to "null"
        ClipMachine now trap error.
Added optional macro to silence PostgreSQL notices
Added logical variables processing for SQL with PG RDBMS
Fixed FieldLen and data type in PostgreSQL
. For char data the returned value was -1, now is the accurate value
. For text field len is now 10 and the type M.
. For date field len is now 8
Added 5th parameter to the parameters array for SQL that indicates for string variables wether it is a constant or not
 . Really, if it should be expanded between '' or not.
Implemented single char type in PosgreSQL
Fixed the parsing of the parameters array in SQL
. By default the behaviour was that the object (row) passed as an argument included all the dimenssions that the parameters array
included, and this can be different.
clip-postgres: Fix get and set timestamp data type