typing error in Documents.SetPageOp.Do. Refs: #193. fixed as proposed by Ivan.
typing error in Documents.SetPageOp.Do. Refs: #193.
fixed as proposed by Ivan.

Signed-off-by: Josef Templ <728e923cfc3fe8323845faf68caa3d182912642a@gmail.com>

BlackBoxCenter/blackbox,BlackBoxCenter/blackbox,BlackBoxCenter/blackbox,BlackBoxCenter/blackbox