The problem was in calculating the cell area, the width should be
subtracted to Right end of cell instead it was adding width to Left
end of the origin cell

Change-Id: I3f31e0c4e0acae84ab5052823fc49932255137d3
Reviewed-on: https://gerrit.libreoffice.org/1686Reviewed-by: Noel Power <noel.power@suse.com>
Tested-by: Noel Power <noel.power@suse.com>