found with
   git grep -n -A4 'if.*!.*empty' | grep -B3 -P
'(\bfor)|(\bwhile)|(\bdo)'

Change-Id: I582235b7cf977a0f9fb4099eb306fdb4a07b5334
Reviewed-on: https://gerrit.libreoffice.org/64169
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>