sw: do not crash when it's not possible to insert fly
sw: do not crash when it's not possible to insert fly

Change-Id: Idfcf54013107ba6b7ce3de0d0bddbef306698f33

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