Log Message:
Updated databases/qore-pgsql-module to version 2.4.1 .

Changes from release notes:
* updated SQLStatement::fetchColumns() to return an empty
  hash when no data is available
* fixed a formatting bug in an error message
* fixed selecting numeric values between 0 and 1
* fixed a bug where DBI-SELECT-ROW-ERROR exceptions were
  being raised as PGSQL-SELECT-ROW-ERROR exceptions