Functionality for fixing rs column types. Access needs that in catalog

functions while linking external ODBC table.
Our catalo functions + SQLGetTypeInfo return all integer fields as int,
while many of them are smallint. MariaDB/MySQL do not allow to cast to
short, thus needed to add some client side magic. Access gets those data
as SQL_C_DEFAULT type, and yilds error if retrned data length differs from
default size(even though standard does not require to return it for fixed
length types).