Else, on any action done directly (not through the
FormControllerHelper) on the controller and raising an SQL error, this
would silently swallow the error message, and the operation would fail
without any message to the user.

E.g. when validating an insertion or modification in a grid control by
moving the cursor to a different line (as opposed to clicking the
"Save Record" button).

Change-Id: Ie569d9c826609f803f7b312c0469907155558ef2
Reviewed-on: https://gerrit.libreoffice.org/17268Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Christian Lohmaier <lohmaier+LibreOffice@googlemail.com>