fix missing return statement
fix missing return statement

...introduced in my commit dc00ad1e823e3b36619cd04c7e4d169362e199b3
"fdo#46808, Use service constructor for task::InteractionHandler"

Change-Id: I187702ee5d6c3e653ce08526bb1af80af0b92cb4

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