Correct error message: the name is the parameter's, not the column's

Change-Id: Ia26fb2dcd443f5c5b5cc48dff209d022388c7519
Reviewed-on: https://gerrit.libreoffice.org/13250
Reviewed-by: Michael Stahl <mstahl@redhat.com>
Tested-by: Michael Stahl <mstahl@redhat.com>