limit the number of imported digits, fdo#58539
limit the number of imported digits, fdo#58539

This should fix the crash with gnome#627420.

Change-Id: Ibfff498282dc1c6fe9124ced645392107ef8829f

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core